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<pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a>
<span class="sourceLineNo">002</span> *******************************************************************************<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (c) 2011, 2016 Diamond Light Source Ltd.<a name="line.3"></a>
<span class="sourceLineNo">004</span> * All rights reserved. This program and the accompanying materials<a name="line.4"></a>
<span class="sourceLineNo">005</span> * are made available under the terms of the Eclipse Public License v1.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * which accompanies this distribution, and is available at<a name="line.6"></a>
<span class="sourceLineNo">007</span> * http://www.eclipse.org/legal/epl-v10.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * Contributors:<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Peter Chang - initial API and implementation and/or initial documentation<a name="line.10"></a>
<span class="sourceLineNo">011</span> *******************************************************************************/<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>package org.eclipse.january.dataset;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.io.Serializable;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.lang.reflect.Array;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.ArrayList;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.Arrays;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.Comparator;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.commons.math3.util.MathArrays;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.eclipse.january.DatasetException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.slf4j.Logger;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.slf4j.LoggerFactory;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>/**<a name="line.27"></a>
<span class="sourceLineNo">028</span> * Utilities for manipulating datasets<a name="line.28"></a>
<span class="sourceLineNo">029</span> */<a name="line.29"></a>
<span class="sourceLineNo">030</span>@SuppressWarnings("unchecked")<a name="line.30"></a>
<span class="sourceLineNo">031</span>public class DatasetUtils {<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span> /**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Setup the logging facilities<a name="line.34"></a>
<span class="sourceLineNo">035</span> */<a name="line.35"></a>
<span class="sourceLineNo">036</span> transient protected static final Logger utilsLogger = LoggerFactory.getLogger(DatasetUtils.class);<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span> /**<a name="line.38"></a>
<span class="sourceLineNo">039</span> * Append copy of dataset with another dataset along n-th axis<a name="line.39"></a>
<span class="sourceLineNo">040</span> *<a name="line.40"></a>
<span class="sourceLineNo">041</span> * @param a<a name="line.41"></a>
<span class="sourceLineNo">042</span> * @param b<a name="line.42"></a>
<span class="sourceLineNo">043</span> * @param axis<a name="line.43"></a>
<span class="sourceLineNo">044</span> * number of axis (negative number counts from last)<a name="line.44"></a>
<span class="sourceLineNo">045</span> * @return appended dataset<a name="line.45"></a>
<span class="sourceLineNo">046</span> */<a name="line.46"></a>
<span class="sourceLineNo">047</span> public static Dataset append(IDataset a, IDataset b, int axis) {<a name="line.47"></a>
<span class="sourceLineNo">048</span> final int[] ashape = a.getShape();<a name="line.48"></a>
<span class="sourceLineNo">049</span> final int rank = ashape.length;<a name="line.49"></a>
<span class="sourceLineNo">050</span> final int[] bshape = b.getShape();<a name="line.50"></a>
<span class="sourceLineNo">051</span> if (rank != bshape.length) {<a name="line.51"></a>
<span class="sourceLineNo">052</span> throw new IllegalArgumentException("Incompatible number of dimensions");<a name="line.52"></a>
<span class="sourceLineNo">053</span> }<a name="line.53"></a>
<span class="sourceLineNo">054</span> axis = ShapeUtils.checkAxis(rank, axis);<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> for (int i = 0; i &lt; rank; i++) {<a name="line.56"></a>
<span class="sourceLineNo">057</span> if (i != axis &amp;&amp; ashape[i] != bshape[i]) {<a name="line.57"></a>
<span class="sourceLineNo">058</span> throw new IllegalArgumentException("Incompatible dimensions");<a name="line.58"></a>
<span class="sourceLineNo">059</span> }<a name="line.59"></a>
<span class="sourceLineNo">060</span> }<a name="line.60"></a>
<span class="sourceLineNo">061</span> final int[] nshape = new int[rank];<a name="line.61"></a>
<span class="sourceLineNo">062</span> for (int i = 0; i &lt; rank; i++) {<a name="line.62"></a>
<span class="sourceLineNo">063</span> nshape[i] = ashape[i];<a name="line.63"></a>
<span class="sourceLineNo">064</span> }<a name="line.64"></a>
<span class="sourceLineNo">065</span> nshape[axis] += bshape[axis];<a name="line.65"></a>
<span class="sourceLineNo">066</span> final Class&lt;? extends Dataset&gt; ot = InterfaceUtils.getInterface(b);<a name="line.66"></a>
<span class="sourceLineNo">067</span> final Class&lt;? extends Dataset&gt; dt = InterfaceUtils.getInterface(a);<a name="line.67"></a>
<span class="sourceLineNo">068</span> Dataset ds = DatasetFactory.zeros(a.getElementsPerItem(), InterfaceUtils.getBestInterface(ot, dt), nshape);<a name="line.68"></a>
<span class="sourceLineNo">069</span> IndexIterator iter = ds.getIterator(true);<a name="line.69"></a>
<span class="sourceLineNo">070</span> int[] pos = iter.getPos();<a name="line.70"></a>
<span class="sourceLineNo">071</span> while (iter.hasNext()) {<a name="line.71"></a>
<span class="sourceLineNo">072</span> int d = ashape[axis];<a name="line.72"></a>
<span class="sourceLineNo">073</span> if (pos[axis] &lt; d) {<a name="line.73"></a>
<span class="sourceLineNo">074</span> ds.setObjectAbs(iter.index, a.getObject(pos));<a name="line.74"></a>
<span class="sourceLineNo">075</span> } else {<a name="line.75"></a>
<span class="sourceLineNo">076</span> pos[axis] -= d;<a name="line.76"></a>
<span class="sourceLineNo">077</span> ds.setObjectAbs(iter.index, b.getObject(pos));<a name="line.77"></a>
<span class="sourceLineNo">078</span> pos[axis] += d;<a name="line.78"></a>
<span class="sourceLineNo">079</span> }<a name="line.79"></a>
<span class="sourceLineNo">080</span> }<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span> return ds;<a name="line.82"></a>
<span class="sourceLineNo">083</span> }<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span> /**<a name="line.85"></a>
<span class="sourceLineNo">086</span> * Changes specific items of dataset by replacing them with other array<a name="line.86"></a>
<span class="sourceLineNo">087</span> * @param a<a name="line.87"></a>
<span class="sourceLineNo">088</span> * @param indices dataset interpreted as integers<a name="line.88"></a>
<span class="sourceLineNo">089</span> * @param values<a name="line.89"></a>
<span class="sourceLineNo">090</span> * @return changed dataset<a name="line.90"></a>
<span class="sourceLineNo">091</span> */<a name="line.91"></a>
<span class="sourceLineNo">092</span> public static &lt;T extends Dataset&gt; T put(final T a, final Dataset indices, Object values) {<a name="line.92"></a>
<span class="sourceLineNo">093</span> IndexIterator it = indices.getIterator();<a name="line.93"></a>
<span class="sourceLineNo">094</span> Dataset vd = DatasetFactory.createFromObject(values).flatten();<a name="line.94"></a>
<span class="sourceLineNo">095</span> int vlen = vd.getSize();<a name="line.95"></a>
<span class="sourceLineNo">096</span> int v = 0;<a name="line.96"></a>
<span class="sourceLineNo">097</span> while (it.hasNext()) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> if (v &gt;= vlen) v -= vlen;<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span> a.setObjectAbs((int) indices.getElementLongAbs(it.index), vd.getObjectAbs(v++));<a name="line.100"></a>
<span class="sourceLineNo">101</span> }<a name="line.101"></a>
<span class="sourceLineNo">102</span> return a;<a name="line.102"></a>
<span class="sourceLineNo">103</span> }<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span> /**<a name="line.105"></a>
<span class="sourceLineNo">106</span> * Changes specific items of dataset by replacing them with other array<a name="line.106"></a>
<span class="sourceLineNo">107</span> * @param a<a name="line.107"></a>
<span class="sourceLineNo">108</span> * @param indices<a name="line.108"></a>
<span class="sourceLineNo">109</span> * @param values<a name="line.109"></a>
<span class="sourceLineNo">110</span> * @return changed dataset<a name="line.110"></a>
<span class="sourceLineNo">111</span> */<a name="line.111"></a>
<span class="sourceLineNo">112</span> public static &lt;T extends Dataset&gt; T put(final T a, final int[] indices, Object values) {<a name="line.112"></a>
<span class="sourceLineNo">113</span> int ilen = indices.length;<a name="line.113"></a>
<span class="sourceLineNo">114</span> Dataset vd = DatasetFactory.createFromObject(values).flatten();<a name="line.114"></a>
<span class="sourceLineNo">115</span> int vlen = vd.getSize();<a name="line.115"></a>
<span class="sourceLineNo">116</span> for (int i = 0, v= 0; i &lt; ilen; i++) {<a name="line.116"></a>
<span class="sourceLineNo">117</span> if (v &gt;= vlen) v -= vlen;<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span> a.setObjectAbs(indices[i], vd.getObjectAbs(v++));<a name="line.119"></a>
<span class="sourceLineNo">120</span> }<a name="line.120"></a>
<span class="sourceLineNo">121</span> return a;<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span> /**<a name="line.124"></a>
<span class="sourceLineNo">125</span> * Take items from dataset along an axis<a name="line.125"></a>
<span class="sourceLineNo">126</span> * @param indices dataset interpreted as integers<a name="line.126"></a>
<span class="sourceLineNo">127</span> * @param axis if null, then use flattened view<a name="line.127"></a>
<span class="sourceLineNo">128</span> * @return a sub-array<a name="line.128"></a>
<span class="sourceLineNo">129</span> */<a name="line.129"></a>
<span class="sourceLineNo">130</span> public static &lt;T extends Dataset&gt; T take(final T a, final Dataset indices, Integer axis) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> IntegerDataset indexes = (IntegerDataset) indices.flatten().cast(IntegerDataset.class);<a name="line.131"></a>
<span class="sourceLineNo">132</span> return take(a, indexes.getData(), axis);<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span> /**<a name="line.135"></a>
<span class="sourceLineNo">136</span> * Take items from dataset along an axis<a name="line.136"></a>
<span class="sourceLineNo">137</span> * @param indices<a name="line.137"></a>
<span class="sourceLineNo">138</span> * @param axis if null, then use flattened view<a name="line.138"></a>
<span class="sourceLineNo">139</span> * @return a sub-array<a name="line.139"></a>
<span class="sourceLineNo">140</span> */<a name="line.140"></a>
<span class="sourceLineNo">141</span> public static &lt;T extends Dataset&gt; T take(final T a, final int[] indices, Integer axis) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> if (indices == null || indices.length == 0) {<a name="line.142"></a>
<span class="sourceLineNo">143</span> utilsLogger.error("No indices given");<a name="line.143"></a>
<span class="sourceLineNo">144</span> throw new IllegalArgumentException("No indices given");<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span> int[] ashape = a.getShape();<a name="line.146"></a>
<span class="sourceLineNo">147</span> final int rank = ashape.length;<a name="line.147"></a>
<span class="sourceLineNo">148</span> final Class&lt;? extends Dataset&gt; ac = a.getClass();<a name="line.148"></a>
<span class="sourceLineNo">149</span> final int ilen = indices.length;<a name="line.149"></a>
<span class="sourceLineNo">150</span> final int is = a.getElementsPerItem();<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> Dataset result;<a name="line.152"></a>
<span class="sourceLineNo">153</span> if (axis == null) {<a name="line.153"></a>
<span class="sourceLineNo">154</span> ashape = new int[1];<a name="line.154"></a>
<span class="sourceLineNo">155</span> ashape[0] = ilen;<a name="line.155"></a>
<span class="sourceLineNo">156</span> result = DatasetFactory.zeros(is, ac, ashape);<a name="line.156"></a>
<span class="sourceLineNo">157</span> Serializable src = a.getBuffer();<a name="line.157"></a>
<span class="sourceLineNo">158</span> for (int i = 0; i &lt; ilen; i++) {<a name="line.158"></a>
<span class="sourceLineNo">159</span> ((AbstractDataset) result).setItemDirect(i, indices[i], src);<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> } else {<a name="line.161"></a>
<span class="sourceLineNo">162</span> axis = a.checkAxis(axis);<a name="line.162"></a>
<span class="sourceLineNo">163</span> ashape[axis] = ilen;<a name="line.163"></a>
<span class="sourceLineNo">164</span> result = DatasetFactory.zeros(is, ac, ashape);<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> int[] dpos = new int[rank];<a name="line.166"></a>
<span class="sourceLineNo">167</span> int[] spos = new int[rank];<a name="line.167"></a>
<span class="sourceLineNo">168</span> boolean[] axes = new boolean[rank];<a name="line.168"></a>
<span class="sourceLineNo">169</span> Arrays.fill(axes, true);<a name="line.169"></a>
<span class="sourceLineNo">170</span> axes[axis] = false;<a name="line.170"></a>
<span class="sourceLineNo">171</span> Serializable src = a.getBuffer();<a name="line.171"></a>
<span class="sourceLineNo">172</span> for (int i = 0; i &lt; ilen; i++) {<a name="line.172"></a>
<span class="sourceLineNo">173</span> spos[axis] = indices[i];<a name="line.173"></a>
<span class="sourceLineNo">174</span> dpos[axis] = i;<a name="line.174"></a>
<span class="sourceLineNo">175</span> SliceIterator siter = a.getSliceIteratorFromAxes(spos, axes);<a name="line.175"></a>
<span class="sourceLineNo">176</span> SliceIterator diter = result.getSliceIteratorFromAxes(dpos, axes);<a name="line.176"></a>
<span class="sourceLineNo">177</span><a name="line.177"></a>
<span class="sourceLineNo">178</span> while (siter.hasNext() &amp;&amp; diter.hasNext()) {<a name="line.178"></a>
<span class="sourceLineNo">179</span> ((AbstractDataset) result).setItemDirect(diter.index, siter.index, src);<a name="line.179"></a>
<span class="sourceLineNo">180</span> }<a name="line.180"></a>
<span class="sourceLineNo">181</span> }<a name="line.181"></a>
<span class="sourceLineNo">182</span> }<a name="line.182"></a>
<span class="sourceLineNo">183</span> result.setDirty();<a name="line.183"></a>
<span class="sourceLineNo">184</span> return (T) result;<a name="line.184"></a>
<span class="sourceLineNo">185</span> }<a name="line.185"></a>
<span class="sourceLineNo">186</span><a name="line.186"></a>
<span class="sourceLineNo">187</span> /**<a name="line.187"></a>
<span class="sourceLineNo">188</span> * Construct a dataset that contains the original dataset repeated the number<a name="line.188"></a>
<span class="sourceLineNo">189</span> * of times in each axis given by corresponding entries in the reps array<a name="line.189"></a>
<span class="sourceLineNo">190</span> *<a name="line.190"></a>
<span class="sourceLineNo">191</span> * @param a<a name="line.191"></a>
<span class="sourceLineNo">192</span> * @param reps<a name="line.192"></a>
<span class="sourceLineNo">193</span> * @return tiled dataset<a name="line.193"></a>
<span class="sourceLineNo">194</span> */<a name="line.194"></a>
<span class="sourceLineNo">195</span> public static Dataset tile(final IDataset a, int... reps) {<a name="line.195"></a>
<span class="sourceLineNo">196</span> int[] shape = a.getShape();<a name="line.196"></a>
<span class="sourceLineNo">197</span> int rank = shape.length;<a name="line.197"></a>
<span class="sourceLineNo">198</span> final int rlen = reps.length;<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span> // expand shape<a name="line.200"></a>
<span class="sourceLineNo">201</span> if (rank &lt; rlen) {<a name="line.201"></a>
<span class="sourceLineNo">202</span> int[] newShape = new int[rlen];<a name="line.202"></a>
<span class="sourceLineNo">203</span> int extraRank = rlen - rank;<a name="line.203"></a>
<span class="sourceLineNo">204</span> for (int i = 0; i &lt; extraRank; i++) {<a name="line.204"></a>
<span class="sourceLineNo">205</span> newShape[i] = 1;<a name="line.205"></a>
<span class="sourceLineNo">206</span> }<a name="line.206"></a>
<span class="sourceLineNo">207</span> for (int i = 0; i &lt; rank; i++) {<a name="line.207"></a>
<span class="sourceLineNo">208</span> newShape[i+extraRank] = shape[i];<a name="line.208"></a>
<span class="sourceLineNo">209</span> }<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span> shape = newShape;<a name="line.211"></a>
<span class="sourceLineNo">212</span> rank = rlen;<a name="line.212"></a>
<span class="sourceLineNo">213</span> } else if (rank &gt; rlen) {<a name="line.213"></a>
<span class="sourceLineNo">214</span> int[] newReps = new int[rank];<a name="line.214"></a>
<span class="sourceLineNo">215</span> int extraRank = rank - rlen;<a name="line.215"></a>
<span class="sourceLineNo">216</span> for (int i = 0; i &lt; extraRank; i++) {<a name="line.216"></a>
<span class="sourceLineNo">217</span> newReps[i] = 1;<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span> for (int i = 0; i &lt; rlen; i++) {<a name="line.219"></a>
<span class="sourceLineNo">220</span> newReps[i+extraRank] = reps[i];<a name="line.220"></a>
<span class="sourceLineNo">221</span> }<a name="line.221"></a>
<span class="sourceLineNo">222</span> reps = newReps;<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span><a name="line.224"></a>
<span class="sourceLineNo">225</span> // calculate new shape<a name="line.225"></a>
<span class="sourceLineNo">226</span> int[] newShape = new int[rank];<a name="line.226"></a>
<span class="sourceLineNo">227</span> for (int i = 0; i &lt; rank; i++) {<a name="line.227"></a>
<span class="sourceLineNo">228</span> newShape[i] = shape[i]*reps[i];<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
<span class="sourceLineNo">230</span><a name="line.230"></a>
<span class="sourceLineNo">231</span> Dataset tdata = DatasetFactory.zeros(a.getElementsPerItem(), InterfaceUtils.getInterfaceFromClass(a.getElementsPerItem(), a.getElementClass()), newShape);<a name="line.231"></a>
<span class="sourceLineNo">232</span><a name="line.232"></a>
<span class="sourceLineNo">233</span> // decide which way to put slices<a name="line.233"></a>
<span class="sourceLineNo">234</span> boolean manyColumns;<a name="line.234"></a>
<span class="sourceLineNo">235</span> if (rank == 1)<a name="line.235"></a>
<span class="sourceLineNo">236</span> manyColumns = true;<a name="line.236"></a>
<span class="sourceLineNo">237</span> else<a name="line.237"></a>
<span class="sourceLineNo">238</span> manyColumns = shape[rank-1] &gt; 64;<a name="line.238"></a>
<span class="sourceLineNo">239</span><a name="line.239"></a>
<span class="sourceLineNo">240</span> if (manyColumns) {<a name="line.240"></a>
<span class="sourceLineNo">241</span> // generate each start point and put a slice in<a name="line.241"></a>
<span class="sourceLineNo">242</span> IndexIterator iter = tdata.getSliceIterator(null, null, shape);<a name="line.242"></a>
<span class="sourceLineNo">243</span> SliceIterator siter = (SliceIterator) tdata.getSliceIterator(null, shape, null);<a name="line.243"></a>
<span class="sourceLineNo">244</span> final int[] pos = iter.getPos();<a name="line.244"></a>
<span class="sourceLineNo">245</span> while (iter.hasNext()) {<a name="line.245"></a>
<span class="sourceLineNo">246</span> siter.setStart(pos);<a name="line.246"></a>
<span class="sourceLineNo">247</span> tdata.setSlice(a, siter);<a name="line.247"></a>
<span class="sourceLineNo">248</span> }<a name="line.248"></a>
<span class="sourceLineNo">249</span><a name="line.249"></a>
<span class="sourceLineNo">250</span> } else {<a name="line.250"></a>
<span class="sourceLineNo">251</span> // for each value, set slice given by repeats<a name="line.251"></a>
<span class="sourceLineNo">252</span> final int[] skip = new int[rank];<a name="line.252"></a>
<span class="sourceLineNo">253</span> for (int i = 0; i &lt; rank; i++) {<a name="line.253"></a>
<span class="sourceLineNo">254</span> if (reps[i] == 1) {<a name="line.254"></a>
<span class="sourceLineNo">255</span> skip[i] = newShape[i];<a name="line.255"></a>
<span class="sourceLineNo">256</span> } else {<a name="line.256"></a>
<span class="sourceLineNo">257</span> skip[i] = shape[i];<a name="line.257"></a>
<span class="sourceLineNo">258</span> }<a name="line.258"></a>
<span class="sourceLineNo">259</span> }<a name="line.259"></a>
<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span> Dataset aa = convertToDataset(a);<a name="line.261"></a>
<span class="sourceLineNo">262</span> IndexIterator ita = aa.getIterator(true);<a name="line.262"></a>
<span class="sourceLineNo">263</span> final int[] pos = ita.getPos();<a name="line.263"></a>
<span class="sourceLineNo">264</span><a name="line.264"></a>
<span class="sourceLineNo">265</span> final int[] sstart = new int[rank];<a name="line.265"></a>
<span class="sourceLineNo">266</span> final int extra = rank - pos.length;<a name="line.266"></a>
<span class="sourceLineNo">267</span> for (int i = 0; i &lt; extra; i++) {<a name="line.267"></a>
<span class="sourceLineNo">268</span> sstart[i] = 0;<a name="line.268"></a>
<span class="sourceLineNo">269</span> }<a name="line.269"></a>
<span class="sourceLineNo">270</span> SliceIterator siter = (SliceIterator) tdata.getSliceIterator(sstart, null, skip);<a name="line.270"></a>
<span class="sourceLineNo">271</span> while (ita.hasNext()) {<a name="line.271"></a>
<span class="sourceLineNo">272</span> for (int i = 0; i &lt; pos.length; i++) {<a name="line.272"></a>
<span class="sourceLineNo">273</span> sstart[i + extra] = pos[i];<a name="line.273"></a>
<span class="sourceLineNo">274</span> }<a name="line.274"></a>
<span class="sourceLineNo">275</span> siter.setStart(sstart);<a name="line.275"></a>
<span class="sourceLineNo">276</span> tdata.setSlice(aa.getObjectAbs(ita.index), siter);<a name="line.276"></a>
<span class="sourceLineNo">277</span> }<a name="line.277"></a>
<span class="sourceLineNo">278</span> }<a name="line.278"></a>
<span class="sourceLineNo">279</span><a name="line.279"></a>
<span class="sourceLineNo">280</span> return tdata;<a name="line.280"></a>
<span class="sourceLineNo">281</span> }<a name="line.281"></a>
<span class="sourceLineNo">282</span><a name="line.282"></a>
<span class="sourceLineNo">283</span> /**<a name="line.283"></a>
<span class="sourceLineNo">284</span> * Permute copy of dataset's axes so that given order is old order:<a name="line.284"></a>
<span class="sourceLineNo">285</span> * &lt;pre&gt;{@literal <a name="line.285"></a>
<span class="sourceLineNo">286</span> * axisPerm = (p(0), p(1),...) =&gt; newdata(n(0), n(1),...) = olddata(o(0), o(1), ...)<a name="line.286"></a>
<span class="sourceLineNo">287</span> * such that n(i) = o(p(i)) for all i<a name="line.287"></a>
<span class="sourceLineNo">288</span> * }&lt;/pre&gt;<a name="line.288"></a>
<span class="sourceLineNo">289</span> * I.e. for a 3D dataset (1,0,2) implies the new dataset has its 1st dimension<a name="line.289"></a>
<span class="sourceLineNo">290</span> * running along the old dataset's 2nd dimension and the new 2nd is the old 1st.<a name="line.290"></a>
<span class="sourceLineNo">291</span> * The 3rd dimension is left unchanged.<a name="line.291"></a>
<span class="sourceLineNo">292</span> *<a name="line.292"></a>
<span class="sourceLineNo">293</span> * @param a<a name="line.293"></a>
<span class="sourceLineNo">294</span> * @param axes if null or zero length then axes order reversed<a name="line.294"></a>
<span class="sourceLineNo">295</span> * @return remapped copy of data<a name="line.295"></a>
<span class="sourceLineNo">296</span> */<a name="line.296"></a>
<span class="sourceLineNo">297</span> public static Dataset transpose(final IDataset a, int... axes) {<a name="line.297"></a>
<span class="sourceLineNo">298</span> return convertToDataset(a).transpose(axes);<a name="line.298"></a>
<span class="sourceLineNo">299</span> }<a name="line.299"></a>
<span class="sourceLineNo">300</span><a name="line.300"></a>
<span class="sourceLineNo">301</span> /**<a name="line.301"></a>
<span class="sourceLineNo">302</span> * Swap two axes in dataset<a name="line.302"></a>
<span class="sourceLineNo">303</span> * @param a<a name="line.303"></a>
<span class="sourceLineNo">304</span> * @param axis1<a name="line.304"></a>
<span class="sourceLineNo">305</span> * @param axis2<a name="line.305"></a>
<span class="sourceLineNo">306</span> * @return swapped dataset<a name="line.306"></a>
<span class="sourceLineNo">307</span> */<a name="line.307"></a>
<span class="sourceLineNo">308</span> public static Dataset swapAxes(final IDataset a, int axis1, int axis2) {<a name="line.308"></a>
<span class="sourceLineNo">309</span> return convertToDataset(a).swapAxes(axis1, axis2);<a name="line.309"></a>
<span class="sourceLineNo">310</span> }<a name="line.310"></a>
<span class="sourceLineNo">311</span><a name="line.311"></a>
<span class="sourceLineNo">312</span> /**<a name="line.312"></a>
<span class="sourceLineNo">313</span> * @param a<a name="line.313"></a>
<span class="sourceLineNo">314</span> * @return sorted flattened copy of dataset<a name="line.314"></a>
<span class="sourceLineNo">315</span> */<a name="line.315"></a>
<span class="sourceLineNo">316</span> public static &lt;T extends Dataset&gt; T sort(final T a) {<a name="line.316"></a>
<span class="sourceLineNo">317</span> return sort(a, (Integer) null);<a name="line.317"></a>
<span class="sourceLineNo">318</span> }<a name="line.318"></a>
<span class="sourceLineNo">319</span><a name="line.319"></a>
<span class="sourceLineNo">320</span> /**<a name="line.320"></a>
<span class="sourceLineNo">321</span> * @param a<a name="line.321"></a>
<span class="sourceLineNo">322</span> * @param axis to sort along, if null then dataset is first flattened<a name="line.322"></a>
<span class="sourceLineNo">323</span> * @return dataset sorted along axis<a name="line.323"></a>
<span class="sourceLineNo">324</span> */<a name="line.324"></a>
<span class="sourceLineNo">325</span> public static &lt;T extends Dataset&gt; T sort(final T a, final Integer axis) {<a name="line.325"></a>
<span class="sourceLineNo">326</span> Dataset s = a.clone();<a name="line.326"></a>
<span class="sourceLineNo">327</span> return (T) s.sort(axis);<a name="line.327"></a>
<span class="sourceLineNo">328</span> }<a name="line.328"></a>
<span class="sourceLineNo">329</span><a name="line.329"></a>
<span class="sourceLineNo">330</span> /**<a name="line.330"></a>
<span class="sourceLineNo">331</span> * Sort in place given dataset and reorder ancillary datasets too<a name="line.331"></a>
<span class="sourceLineNo">332</span> * @param a dataset to be sorted<a name="line.332"></a>
<span class="sourceLineNo">333</span> * @param b ancillary datasets<a name="line.333"></a>
<span class="sourceLineNo">334</span> */<a name="line.334"></a>
<span class="sourceLineNo">335</span> public static void sort(Dataset a, Dataset... b) {<a name="line.335"></a>
<span class="sourceLineNo">336</span> if (!DTypeUtils.isDTypeNumerical(a.getDType())) {<a name="line.336"></a>
<span class="sourceLineNo">337</span> throw new UnsupportedOperationException("Sorting non-numerical datasets not supported yet");<a name="line.337"></a>
<span class="sourceLineNo">338</span> }<a name="line.338"></a>
<span class="sourceLineNo">339</span><a name="line.339"></a>
<span class="sourceLineNo">340</span> // gather all datasets as double dataset copies<a name="line.340"></a>
<span class="sourceLineNo">341</span> DoubleDataset s = copy(DoubleDataset.class, a);<a name="line.341"></a>
<span class="sourceLineNo">342</span> int l = b == null ? 0 : b.length;<a name="line.342"></a>
<span class="sourceLineNo">343</span> DoubleDataset[] t = new DoubleDataset[l];<a name="line.343"></a>
<span class="sourceLineNo">344</span> int n = 0;<a name="line.344"></a>
<span class="sourceLineNo">345</span> for (int i = 0; i &lt; l; i++) {<a name="line.345"></a>
<span class="sourceLineNo">346</span> if (b[i] != null) {<a name="line.346"></a>
<span class="sourceLineNo">347</span> if (!DTypeUtils.isDTypeNumerical(b[i].getDType())) {<a name="line.347"></a>
<span class="sourceLineNo">348</span> throw new UnsupportedOperationException("Sorting non-numerical datasets not supported yet");<a name="line.348"></a>
<span class="sourceLineNo">349</span> }<a name="line.349"></a>
<span class="sourceLineNo">350</span> t[i] = copy(DoubleDataset.class, b[i]);<a name="line.350"></a>
<span class="sourceLineNo">351</span> n++;<a name="line.351"></a>
<span class="sourceLineNo">352</span> }<a name="line.352"></a>
<span class="sourceLineNo">353</span> }<a name="line.353"></a>
<span class="sourceLineNo">354</span><a name="line.354"></a>
<span class="sourceLineNo">355</span> double[][] y = new double[n][];<a name="line.355"></a>
<span class="sourceLineNo">356</span> for (int i = 0, j = 0; i &lt; l; i++) {<a name="line.356"></a>
<span class="sourceLineNo">357</span> if (t[i] != null) {<a name="line.357"></a>
<span class="sourceLineNo">358</span> y[j++] = t[i].getData();<a name="line.358"></a>
<span class="sourceLineNo">359</span> }<a name="line.359"></a>
<span class="sourceLineNo">360</span> }<a name="line.360"></a>
<span class="sourceLineNo">361</span><a name="line.361"></a>
<span class="sourceLineNo">362</span> MathArrays.sortInPlace(s.getData(), y);<a name="line.362"></a>
<span class="sourceLineNo">363</span><a name="line.363"></a>
<span class="sourceLineNo">364</span> a.setSlice(s);<a name="line.364"></a>
<span class="sourceLineNo">365</span> for (int i = 0; i &lt; l; i++) {<a name="line.365"></a>
<span class="sourceLineNo">366</span> if (b[i] != null) {<a name="line.366"></a>
<span class="sourceLineNo">367</span> b[i].setSlice(t[i]);<a name="line.367"></a>
<span class="sourceLineNo">368</span> }<a name="line.368"></a>
<span class="sourceLineNo">369</span> }<a name="line.369"></a>
<span class="sourceLineNo">370</span> }<a name="line.370"></a>
<span class="sourceLineNo">371</span><a name="line.371"></a>
<span class="sourceLineNo">372</span> /**<a name="line.372"></a>
<span class="sourceLineNo">373</span> * Indirectly sort along given axis<a name="line.373"></a>
<span class="sourceLineNo">374</span> * @param a dataset whose indexes will be sorted<a name="line.374"></a>
<span class="sourceLineNo">375</span> * @param axis to sort along, if null then dataset is first flattened<a name="line.375"></a>
<span class="sourceLineNo">376</span> * @return indexes<a name="line.376"></a>
<span class="sourceLineNo">377</span> * @since 2.1<a name="line.377"></a>
<span class="sourceLineNo">378</span> */<a name="line.378"></a>
<span class="sourceLineNo">379</span> public static IntegerDataset indexSort(Dataset a, Integer axis) {<a name="line.379"></a>
<span class="sourceLineNo">380</span> if (axis == null) {<a name="line.380"></a>
<span class="sourceLineNo">381</span> int size = a.getSize();<a name="line.381"></a>
<span class="sourceLineNo">382</span> Integer[] index = new Integer[size];<a name="line.382"></a>
<span class="sourceLineNo">383</span> for (int i = 0; i &lt; size; i++) {<a name="line.383"></a>
<span class="sourceLineNo">384</span> index[i] = i;<a name="line.384"></a>
<span class="sourceLineNo">385</span> }<a name="line.385"></a>
<span class="sourceLineNo">386</span> final Dataset f = a.flatten(); // is this correct for views??? Check with NumPy<a name="line.386"></a>
<span class="sourceLineNo">387</span> Comparator&lt;Integer&gt; cmp = new Comparator&lt;Integer&gt;() {<a name="line.387"></a>
<span class="sourceLineNo">388</span><a name="line.388"></a>
<span class="sourceLineNo">389</span> @Override<a name="line.389"></a>
<span class="sourceLineNo">390</span> public int compare(Integer o1, Integer o2) {<a name="line.390"></a>
<span class="sourceLineNo">391</span><a name="line.391"></a>
<span class="sourceLineNo">392</span> return Double.compare(f.getElementDoubleAbs(o1), f.getElementDoubleAbs(o2));<a name="line.392"></a>
<span class="sourceLineNo">393</span> }<a name="line.393"></a>
<span class="sourceLineNo">394</span> };<a name="line.394"></a>
<span class="sourceLineNo">395</span> Arrays.sort(index, cmp);<a name="line.395"></a>
<span class="sourceLineNo">396</span> return DatasetFactory.createFromObject(IntegerDataset.class, index);<a name="line.396"></a>
<span class="sourceLineNo">397</span> }<a name="line.397"></a>
<span class="sourceLineNo">398</span><a name="line.398"></a>
<span class="sourceLineNo">399</span> axis = a.checkAxis(axis);<a name="line.399"></a>
<span class="sourceLineNo">400</span> final int[] shape = a.getShapeRef();<a name="line.400"></a>
<span class="sourceLineNo">401</span> IntegerDataset id = DatasetFactory.zeros(IntegerDataset.class, shape);<a name="line.401"></a>
<span class="sourceLineNo">402</span> int size = shape[axis];<a name="line.402"></a>
<span class="sourceLineNo">403</span> Integer[] index = new Integer[size];<a name="line.403"></a>
<span class="sourceLineNo">404</span><a name="line.404"></a>
<span class="sourceLineNo">405</span> int[] dShape = new int[shape.length];<a name="line.405"></a>
<span class="sourceLineNo">406</span> Arrays.fill(dShape, 1);<a name="line.406"></a>
<span class="sourceLineNo">407</span> dShape[axis] = size;<a name="line.407"></a>
<span class="sourceLineNo">408</span> final DoubleDataset dd = DatasetFactory.zeros(DoubleDataset.class, dShape);<a name="line.408"></a>
<span class="sourceLineNo">409</span> final Comparator&lt;Integer&gt; cmp = new Comparator&lt;Integer&gt;() {<a name="line.409"></a>
<span class="sourceLineNo">410</span> @Override<a name="line.410"></a>
<span class="sourceLineNo">411</span> public int compare(Integer o1, Integer o2) {<a name="line.411"></a>
<span class="sourceLineNo">412</span><a name="line.412"></a>
<span class="sourceLineNo">413</span> return Double.compare(dd.getElementDoubleAbs(o1), dd.getElementDoubleAbs(o2));<a name="line.413"></a>
<span class="sourceLineNo">414</span> }<a name="line.414"></a>
<span class="sourceLineNo">415</span> };<a name="line.415"></a>
<span class="sourceLineNo">416</span><a name="line.416"></a>
<span class="sourceLineNo">417</span> SliceND ds = new SliceND(dShape);<a name="line.417"></a>
<span class="sourceLineNo">418</span> SliceNDIterator it = new SliceNDIterator(new SliceND(shape), axis);<a name="line.418"></a>
<span class="sourceLineNo">419</span> int[] pos = it.getPos();<a name="line.419"></a>
<span class="sourceLineNo">420</span> int[] ipos = pos.clone();<a name="line.420"></a>
<span class="sourceLineNo">421</span> while (it.hasNext()) {<a name="line.421"></a>
<span class="sourceLineNo">422</span> dd.setSlice(a.getSliceView(it.getCurrentSlice()), ds);<a name="line.422"></a>
<span class="sourceLineNo">423</span> for (int i = 0; i &lt; size; i++) {<a name="line.423"></a>
<span class="sourceLineNo">424</span> index[i] = i;<a name="line.424"></a>
<span class="sourceLineNo">425</span> }<a name="line.425"></a>
<span class="sourceLineNo">426</span> Arrays.sort(index, cmp);<a name="line.426"></a>
<span class="sourceLineNo">427</span><a name="line.427"></a>
<span class="sourceLineNo">428</span> System.arraycopy(pos, 0, ipos, 0, pos.length);<a name="line.428"></a>
<span class="sourceLineNo">429</span> for (int i = 0; i &lt; size; i++) {<a name="line.429"></a>
<span class="sourceLineNo">430</span> ipos[axis] = i;<a name="line.430"></a>
<span class="sourceLineNo">431</span> id.set(index[i], ipos);<a name="line.431"></a>
<span class="sourceLineNo">432</span> }<a name="line.432"></a>
<span class="sourceLineNo">433</span> }<a name="line.433"></a>
<span class="sourceLineNo">434</span><a name="line.434"></a>
<span class="sourceLineNo">435</span> return id;<a name="line.435"></a>
<span class="sourceLineNo">436</span> }<a name="line.436"></a>
<span class="sourceLineNo">437</span><a name="line.437"></a>
<span class="sourceLineNo">438</span> /**<a name="line.438"></a>
<span class="sourceLineNo">439</span> * Concatenate the set of datasets along given axis<a name="line.439"></a>
<span class="sourceLineNo">440</span> * @param as<a name="line.440"></a>
<span class="sourceLineNo">441</span> * @param axis<a name="line.441"></a>
<span class="sourceLineNo">442</span> * @return concatenated dataset<a name="line.442"></a>
<span class="sourceLineNo">443</span> */<a name="line.443"></a>
<span class="sourceLineNo">444</span> public static Dataset concatenate(final IDataset[] as, int axis) {<a name="line.444"></a>
<span class="sourceLineNo">445</span> if (as == null || as.length == 0) {<a name="line.445"></a>
<span class="sourceLineNo">446</span> utilsLogger.error("No datasets given");<a name="line.446"></a>
<span class="sourceLineNo">447</span> throw new IllegalArgumentException("No datasets given");<a name="line.447"></a>
<span class="sourceLineNo">448</span> }<a name="line.448"></a>
<span class="sourceLineNo">449</span> IDataset a = as[0];<a name="line.449"></a>
<span class="sourceLineNo">450</span> if (as.length == 1) {<a name="line.450"></a>
<span class="sourceLineNo">451</span> return convertToDataset(a.clone());<a name="line.451"></a>
<span class="sourceLineNo">452</span> }<a name="line.452"></a>
<span class="sourceLineNo">453</span><a name="line.453"></a>
<span class="sourceLineNo">454</span> int[] ashape = a.getShape();<a name="line.454"></a>
<span class="sourceLineNo">455</span> axis = ShapeUtils.checkAxis(ashape.length, axis);<a name="line.455"></a>
<span class="sourceLineNo">456</span> Class&lt;? extends Dataset&gt; ac = InterfaceUtils.getInterface(a);<a name="line.456"></a>
<span class="sourceLineNo">457</span> int anum = as.length;<a name="line.457"></a>
<span class="sourceLineNo">458</span> int isize = a.getElementsPerItem();<a name="line.458"></a>
<span class="sourceLineNo">459</span><a name="line.459"></a>
<span class="sourceLineNo">460</span> int i = 1;<a name="line.460"></a>
<span class="sourceLineNo">461</span> for (; i &lt; anum; i++) {<a name="line.461"></a>
<span class="sourceLineNo">462</span> if (!ac.equals(InterfaceUtils.getInterface(as[i]))) {<a name="line.462"></a>
<span class="sourceLineNo">463</span> utilsLogger.error("Datasets are not of same type");<a name="line.463"></a>
<span class="sourceLineNo">464</span> break;<a name="line.464"></a>
<span class="sourceLineNo">465</span> }<a name="line.465"></a>
<span class="sourceLineNo">466</span> if (!ShapeUtils.areShapesCompatible(ashape, as[i].getShape(), axis)) {<a name="line.466"></a>
<span class="sourceLineNo">467</span> utilsLogger.error("Datasets' shapes are not equal");<a name="line.467"></a>
<span class="sourceLineNo">468</span> break;<a name="line.468"></a>
<span class="sourceLineNo">469</span> }<a name="line.469"></a>
<span class="sourceLineNo">470</span> final int is = as[i].getElementsPerItem();<a name="line.470"></a>
<span class="sourceLineNo">471</span> if (isize &lt; is)<a name="line.471"></a>
<span class="sourceLineNo">472</span> isize = is;<a name="line.472"></a>
<span class="sourceLineNo">473</span> }<a name="line.473"></a>
<span class="sourceLineNo">474</span> if (i &lt; anum) {<a name="line.474"></a>
<span class="sourceLineNo">475</span> utilsLogger.error("Dataset are not compatible");<a name="line.475"></a>
<span class="sourceLineNo">476</span> throw new IllegalArgumentException("Datasets are not compatible");<a name="line.476"></a>
<span class="sourceLineNo">477</span> }<a name="line.477"></a>
<span class="sourceLineNo">478</span><a name="line.478"></a>
<span class="sourceLineNo">479</span> for (i = 1; i &lt; anum; i++) {<a name="line.479"></a>
<span class="sourceLineNo">480</span> ashape[axis] += as[i].getShape()[axis];<a name="line.480"></a>
<span class="sourceLineNo">481</span> }<a name="line.481"></a>
<span class="sourceLineNo">482</span><a name="line.482"></a>
<span class="sourceLineNo">483</span> Dataset result = DatasetFactory.zeros(isize, ac, ashape);<a name="line.483"></a>
<span class="sourceLineNo">484</span><a name="line.484"></a>
<span class="sourceLineNo">485</span> int[] start = new int[ashape.length];<a name="line.485"></a>
<span class="sourceLineNo">486</span> int[] stop = ashape;<a name="line.486"></a>
<span class="sourceLineNo">487</span> stop[axis] = 0;<a name="line.487"></a>
<span class="sourceLineNo">488</span> for (i = 0; i &lt; anum; i++) {<a name="line.488"></a>
<span class="sourceLineNo">489</span> IDataset b = as[i];<a name="line.489"></a>
<span class="sourceLineNo">490</span> int[] bshape = b.getShape();<a name="line.490"></a>
<span class="sourceLineNo">491</span> stop[axis] += bshape[axis];<a name="line.491"></a>
<span class="sourceLineNo">492</span> result.setSlice(b, start, stop, null);<a name="line.492"></a>
<span class="sourceLineNo">493</span> start[axis] += bshape[axis];<a name="line.493"></a>
<span class="sourceLineNo">494</span> }<a name="line.494"></a>
<span class="sourceLineNo">495</span><a name="line.495"></a>
<span class="sourceLineNo">496</span> return result;<a name="line.496"></a>
<span class="sourceLineNo">497</span> }<a name="line.497"></a>
<span class="sourceLineNo">498</span><a name="line.498"></a>
<span class="sourceLineNo">499</span> /**<a name="line.499"></a>
<span class="sourceLineNo">500</span> * Split a dataset into equal sections along given axis<a name="line.500"></a>
<span class="sourceLineNo">501</span> * @param a<a name="line.501"></a>
<span class="sourceLineNo">502</span> * @param sections<a name="line.502"></a>
<span class="sourceLineNo">503</span> * @param axis<a name="line.503"></a>
<span class="sourceLineNo">504</span> * @param checkEqual makes sure the division is into equal parts<a name="line.504"></a>
<span class="sourceLineNo">505</span> * @return list of split datasets<a name="line.505"></a>
<span class="sourceLineNo">506</span> */<a name="line.506"></a>
<span class="sourceLineNo">507</span> public static List&lt;Dataset&gt; split(final Dataset a, int sections, int axis, final boolean checkEqual) {<a name="line.507"></a>
<span class="sourceLineNo">508</span> int[] ashape = a.getShapeRef();<a name="line.508"></a>
<span class="sourceLineNo">509</span> axis = a.checkAxis(axis);<a name="line.509"></a>
<span class="sourceLineNo">510</span> int imax = ashape[axis];<a name="line.510"></a>
<span class="sourceLineNo">511</span> if (checkEqual &amp;&amp; (imax%sections) != 0) {<a name="line.511"></a>
<span class="sourceLineNo">512</span> utilsLogger.error("Number of sections does not divide axis into equal parts");<a name="line.512"></a>
<span class="sourceLineNo">513</span> throw new IllegalArgumentException("Number of sections does not divide axis into equal parts");<a name="line.513"></a>
<span class="sourceLineNo">514</span> }<a name="line.514"></a>
<span class="sourceLineNo">515</span> int n = (imax + sections - 1) / sections;<a name="line.515"></a>
<span class="sourceLineNo">516</span> int[] indices = new int[sections-1];<a name="line.516"></a>
<span class="sourceLineNo">517</span> for (int i = 1; i &lt; sections; i++)<a name="line.517"></a>
<span class="sourceLineNo">518</span> indices[i-1] = n*i;<a name="line.518"></a>
<span class="sourceLineNo">519</span> return split(a, indices, axis);<a name="line.519"></a>
<span class="sourceLineNo">520</span> }<a name="line.520"></a>
<span class="sourceLineNo">521</span><a name="line.521"></a>
<span class="sourceLineNo">522</span> /**<a name="line.522"></a>
<span class="sourceLineNo">523</span> * Split a dataset into parts along given axis<a name="line.523"></a>
<span class="sourceLineNo">524</span> * @param a<a name="line.524"></a>
<span class="sourceLineNo">525</span> * @param indices<a name="line.525"></a>
<span class="sourceLineNo">526</span> * @param axis<a name="line.526"></a>
<span class="sourceLineNo">527</span> * @return list of split datasets<a name="line.527"></a>
<span class="sourceLineNo">528</span> */<a name="line.528"></a>
<span class="sourceLineNo">529</span> public static List&lt;Dataset&gt; split(final Dataset a, int[] indices, int axis) {<a name="line.529"></a>
<span class="sourceLineNo">530</span> final int[] ashape = a.getShapeRef();<a name="line.530"></a>
<span class="sourceLineNo">531</span> axis = a.checkAxis(axis);<a name="line.531"></a>
<span class="sourceLineNo">532</span> final int rank = ashape.length;<a name="line.532"></a>
<span class="sourceLineNo">533</span> final int imax = ashape[axis];<a name="line.533"></a>
<span class="sourceLineNo">534</span><a name="line.534"></a>
<span class="sourceLineNo">535</span> final List&lt;Dataset&gt; result = new ArrayList&lt;Dataset&gt;();<a name="line.535"></a>
<span class="sourceLineNo">536</span><a name="line.536"></a>
<span class="sourceLineNo">537</span> final int[] nshape = ashape.clone();<a name="line.537"></a>
<span class="sourceLineNo">538</span> final int is = a.getElementsPerItem();<a name="line.538"></a>
<span class="sourceLineNo">539</span><a name="line.539"></a>
<span class="sourceLineNo">540</span> int oind = 0;<a name="line.540"></a>
<span class="sourceLineNo">541</span> final int[] start = new int[rank];<a name="line.541"></a>
<span class="sourceLineNo">542</span> final int[] stop = new int[rank];<a name="line.542"></a>
<span class="sourceLineNo">543</span> final int[] step = new int[rank];<a name="line.543"></a>
<span class="sourceLineNo">544</span> for (int i = 0; i &lt; rank; i++) {<a name="line.544"></a>
<span class="sourceLineNo">545</span> start[i] = 0;<a name="line.545"></a>
<span class="sourceLineNo">546</span> stop[i] = ashape[i];<a name="line.546"></a>
<span class="sourceLineNo">547</span> step[i] = 1;<a name="line.547"></a>
<span class="sourceLineNo">548</span> }<a name="line.548"></a>
<span class="sourceLineNo">549</span> for (int ind : indices) {<a name="line.549"></a>
<span class="sourceLineNo">550</span> if (ind &gt; imax) {<a name="line.550"></a>
<span class="sourceLineNo">551</span> result.add(DatasetFactory.zeros(is, a.getClass(), 0));<a name="line.551"></a>
<span class="sourceLineNo">552</span> } else {<a name="line.552"></a>
<span class="sourceLineNo">553</span> nshape[axis] = ind - oind;<a name="line.553"></a>
<span class="sourceLineNo">554</span> start[axis] = oind;<a name="line.554"></a>
<span class="sourceLineNo">555</span> stop[axis] = ind;<a name="line.555"></a>
<span class="sourceLineNo">556</span> Dataset n = DatasetFactory.zeros(is, a.getClass(), nshape);<a name="line.556"></a>
<span class="sourceLineNo">557</span> IndexIterator iter = a.getSliceIterator(start, stop, step);<a name="line.557"></a>
<span class="sourceLineNo">558</span><a name="line.558"></a>
<span class="sourceLineNo">559</span> a.fillDataset(n, iter);<a name="line.559"></a>
<span class="sourceLineNo">560</span> result.add(n);<a name="line.560"></a>
<span class="sourceLineNo">561</span> oind = ind;<a name="line.561"></a>
<span class="sourceLineNo">562</span> }<a name="line.562"></a>
<span class="sourceLineNo">563</span> }<a name="line.563"></a>
<span class="sourceLineNo">564</span><a name="line.564"></a>
<span class="sourceLineNo">565</span> if (imax &gt; oind) {<a name="line.565"></a>
<span class="sourceLineNo">566</span> nshape[axis] = imax - oind;<a name="line.566"></a>
<span class="sourceLineNo">567</span> start[axis] = oind;<a name="line.567"></a>
<span class="sourceLineNo">568</span> stop[axis] = imax;<a name="line.568"></a>
<span class="sourceLineNo">569</span> Dataset n = DatasetFactory.zeros(is, a.getClass(), nshape);<a name="line.569"></a>
<span class="sourceLineNo">570</span> IndexIterator iter = a.getSliceIterator(start, stop, step);<a name="line.570"></a>
<span class="sourceLineNo">571</span><a name="line.571"></a>
<span class="sourceLineNo">572</span> a.fillDataset(n, iter);<a name="line.572"></a>
<span class="sourceLineNo">573</span> result.add(n);<a name="line.573"></a>
<span class="sourceLineNo">574</span> }<a name="line.574"></a>
<span class="sourceLineNo">575</span><a name="line.575"></a>
<span class="sourceLineNo">576</span> return result;<a name="line.576"></a>
<span class="sourceLineNo">577</span> }<a name="line.577"></a>
<span class="sourceLineNo">578</span><a name="line.578"></a>
<span class="sourceLineNo">579</span> /**<a name="line.579"></a>
<span class="sourceLineNo">580</span> * Constructs a dataset which has its elements along an axis replicated from<a name="line.580"></a>
<span class="sourceLineNo">581</span> * the original dataset by the number of times given in the repeats array.<a name="line.581"></a>
<span class="sourceLineNo">582</span> *<a name="line.582"></a>
<span class="sourceLineNo">583</span> * By default, axis=-1 implies using a flattened version of the input dataset<a name="line.583"></a>
<span class="sourceLineNo">584</span> *<a name="line.584"></a>
<span class="sourceLineNo">585</span> * @param a<a name="line.585"></a>
<span class="sourceLineNo">586</span> * @param repeats<a name="line.586"></a>
<span class="sourceLineNo">587</span> * @param axis<a name="line.587"></a>
<span class="sourceLineNo">588</span> * @return dataset<a name="line.588"></a>
<span class="sourceLineNo">589</span> */<a name="line.589"></a>
<span class="sourceLineNo">590</span> public static &lt;T extends Dataset&gt; T repeat(T a, int[] repeats, int axis) {<a name="line.590"></a>
<span class="sourceLineNo">591</span> Serializable buf = a.getBuffer();<a name="line.591"></a>
<span class="sourceLineNo">592</span> int[] shape = a.getShape();<a name="line.592"></a>
<span class="sourceLineNo">593</span> int rank = shape.length;<a name="line.593"></a>
<span class="sourceLineNo">594</span> final int is = a.getElementsPerItem();<a name="line.594"></a>
<span class="sourceLineNo">595</span><a name="line.595"></a>
<span class="sourceLineNo">596</span> if (axis &gt;= rank) {<a name="line.596"></a>
<span class="sourceLineNo">597</span> utilsLogger.warn("Axis value is out of bounds");<a name="line.597"></a>
<span class="sourceLineNo">598</span> throw new IllegalArgumentException("Axis value is out of bounds");<a name="line.598"></a>
<span class="sourceLineNo">599</span> }<a name="line.599"></a>
<span class="sourceLineNo">600</span><a name="line.600"></a>
<span class="sourceLineNo">601</span> int alen;<a name="line.601"></a>
<span class="sourceLineNo">602</span> if (axis &lt; 0) {<a name="line.602"></a>
<span class="sourceLineNo">603</span> alen = a.getSize();<a name="line.603"></a>
<span class="sourceLineNo">604</span> axis = 0;<a name="line.604"></a>
<span class="sourceLineNo">605</span> rank = 1;<a name="line.605"></a>
<span class="sourceLineNo">606</span> shape[0] = alen;<a name="line.606"></a>
<span class="sourceLineNo">607</span> } else {<a name="line.607"></a>
<span class="sourceLineNo">608</span> alen = shape[axis];<a name="line.608"></a>
<span class="sourceLineNo">609</span> }<a name="line.609"></a>
<span class="sourceLineNo">610</span> int rlen = repeats.length;<a name="line.610"></a>
<span class="sourceLineNo">611</span> if (rlen != 1 &amp;&amp; rlen != alen) {<a name="line.611"></a>
<span class="sourceLineNo">612</span> utilsLogger.warn("Repeats array should have length of 1 or match chosen axis");<a name="line.612"></a>
<span class="sourceLineNo">613</span> throw new IllegalArgumentException("Repeats array should have length of 1 or match chosen axis");<a name="line.613"></a>
<span class="sourceLineNo">614</span> }<a name="line.614"></a>
<span class="sourceLineNo">615</span><a name="line.615"></a>
<span class="sourceLineNo">616</span> for (int i = 0; i &lt; rlen; i++) {<a name="line.616"></a>
<span class="sourceLineNo">617</span> if (repeats[i] &lt; 0) {<a name="line.617"></a>
<span class="sourceLineNo">618</span> utilsLogger.warn("Negative repeat value is not allowed");<a name="line.618"></a>
<span class="sourceLineNo">619</span> throw new IllegalArgumentException("Negative repeat value is not allowed");<a name="line.619"></a>
<span class="sourceLineNo">620</span> }<a name="line.620"></a>
<span class="sourceLineNo">621</span> }<a name="line.621"></a>
<span class="sourceLineNo">622</span><a name="line.622"></a>
<span class="sourceLineNo">623</span> int[] newShape = new int[rank];<a name="line.623"></a>
<span class="sourceLineNo">624</span> for (int i = 0; i &lt; rank; i ++)<a name="line.624"></a>
<span class="sourceLineNo">625</span> newShape[i] = shape[i];<a name="line.625"></a>
<span class="sourceLineNo">626</span><a name="line.626"></a>
<span class="sourceLineNo">627</span> // do single repeat separately<a name="line.627"></a>
<span class="sourceLineNo">628</span> if (repeats.length == 1) {<a name="line.628"></a>
<span class="sourceLineNo">629</span> newShape[axis] *= repeats[0];<a name="line.629"></a>
<span class="sourceLineNo">630</span> } else {<a name="line.630"></a>
<span class="sourceLineNo">631</span> int nlen = 0;<a name="line.631"></a>
<span class="sourceLineNo">632</span> for (int i = 0; i &lt; alen; i++) {<a name="line.632"></a>
<span class="sourceLineNo">633</span> nlen += repeats[i];<a name="line.633"></a>
<span class="sourceLineNo">634</span> }<a name="line.634"></a>
<span class="sourceLineNo">635</span> newShape[axis] = nlen;<a name="line.635"></a>
<span class="sourceLineNo">636</span> }<a name="line.636"></a>
<span class="sourceLineNo">637</span><a name="line.637"></a>
<span class="sourceLineNo">638</span> Dataset rdata = DatasetFactory.zeros(is, a.getClass(), newShape);<a name="line.638"></a>
<span class="sourceLineNo">639</span> Serializable nbuf = rdata.getBuffer();<a name="line.639"></a>
<span class="sourceLineNo">640</span><a name="line.640"></a>
<span class="sourceLineNo">641</span> int csize = is; // chunk size<a name="line.641"></a>
<span class="sourceLineNo">642</span> for (int i = axis+1; i &lt; rank; i++) {<a name="line.642"></a>
<span class="sourceLineNo">643</span> csize *= newShape[i];<a name="line.643"></a>
<span class="sourceLineNo">644</span> }<a name="line.644"></a>
<span class="sourceLineNo">645</span> int nout = 1;<a name="line.645"></a>
<span class="sourceLineNo">646</span> for (int i = 0; i &lt; axis; i++) {<a name="line.646"></a>
<span class="sourceLineNo">647</span> nout *= newShape[i];<a name="line.647"></a>
<span class="sourceLineNo">648</span> }<a name="line.648"></a>
<span class="sourceLineNo">649</span><a name="line.649"></a>
<span class="sourceLineNo">650</span> int oi = 0;<a name="line.650"></a>
<span class="sourceLineNo">651</span> int ni = 0;<a name="line.651"></a>
<span class="sourceLineNo">652</span> if (rlen == 1) { // do single repeat separately<a name="line.652"></a>
<span class="sourceLineNo">653</span> for (int i = 0; i &lt; nout; i++) {<a name="line.653"></a>
<span class="sourceLineNo">654</span> for (int j = 0; j &lt; shape[axis]; j++) {<a name="line.654"></a>
<span class="sourceLineNo">655</span> for (int k = 0; k &lt; repeats[0]; k++) {<a name="line.655"></a>
<span class="sourceLineNo">656</span> System.arraycopy(buf, oi, nbuf, ni, csize);<a name="line.656"></a>
<span class="sourceLineNo">657</span> ni += csize;<a name="line.657"></a>
<span class="sourceLineNo">658</span> }<a name="line.658"></a>
<span class="sourceLineNo">659</span> oi += csize;<a name="line.659"></a>
<span class="sourceLineNo">660</span> }<a name="line.660"></a>
<span class="sourceLineNo">661</span> }<a name="line.661"></a>
<span class="sourceLineNo">662</span> } else {<a name="line.662"></a>
<span class="sourceLineNo">663</span> for (int i = 0; i &lt; nout; i++) {<a name="line.663"></a>
<span class="sourceLineNo">664</span> for (int j = 0; j &lt; shape[axis]; j++) {<a name="line.664"></a>
<span class="sourceLineNo">665</span> for (int k = 0; k &lt; repeats[j]; k++) {<a name="line.665"></a>
<span class="sourceLineNo">666</span> System.arraycopy(buf, oi, nbuf, ni, csize);<a name="line.666"></a>
<span class="sourceLineNo">667</span> ni += csize;<a name="line.667"></a>
<span class="sourceLineNo">668</span> }<a name="line.668"></a>
<span class="sourceLineNo">669</span> oi += csize;<a name="line.669"></a>
<span class="sourceLineNo">670</span> }<a name="line.670"></a>
<span class="sourceLineNo">671</span> }<a name="line.671"></a>
<span class="sourceLineNo">672</span> }<a name="line.672"></a>
<span class="sourceLineNo">673</span><a name="line.673"></a>
<span class="sourceLineNo">674</span> return (T) rdata;<a name="line.674"></a>
<span class="sourceLineNo">675</span> }<a name="line.675"></a>
<span class="sourceLineNo">676</span><a name="line.676"></a>
<span class="sourceLineNo">677</span> /**<a name="line.677"></a>
<span class="sourceLineNo">678</span> * Resize a dataset<a name="line.678"></a>
<span class="sourceLineNo">679</span> * @param a<a name="line.679"></a>
<span class="sourceLineNo">680</span> * @param shape<a name="line.680"></a>
<span class="sourceLineNo">681</span> * @return new dataset with new shape and items that are truncated or repeated, as necessary<a name="line.681"></a>
<span class="sourceLineNo">682</span> */<a name="line.682"></a>
<span class="sourceLineNo">683</span> public static &lt;T extends Dataset&gt; T resize(final T a, final int... shape) {<a name="line.683"></a>
<span class="sourceLineNo">684</span> int size = a.getSize();<a name="line.684"></a>
<span class="sourceLineNo">685</span> Dataset rdata = DatasetFactory.zeros(a.getElementsPerItem(), a.getClass(), shape);<a name="line.685"></a>
<span class="sourceLineNo">686</span> IndexIterator it = rdata.getIterator();<a name="line.686"></a>
<span class="sourceLineNo">687</span> while (it.hasNext()) {<a name="line.687"></a>
<span class="sourceLineNo">688</span> rdata.setObjectAbs(it.index, a.getObjectAbs(it.index % size));<a name="line.688"></a>
<span class="sourceLineNo">689</span> }<a name="line.689"></a>
<span class="sourceLineNo">690</span><a name="line.690"></a>
<span class="sourceLineNo">691</span> return (T) rdata;<a name="line.691"></a>
<span class="sourceLineNo">692</span> }<a name="line.692"></a>
<span class="sourceLineNo">693</span><a name="line.693"></a>
<span class="sourceLineNo">694</span> /**<a name="line.694"></a>
<span class="sourceLineNo">695</span> * Copy and cast a dataset<a name="line.695"></a>
<span class="sourceLineNo">696</span> *<a name="line.696"></a>
<span class="sourceLineNo">697</span> * @param d<a name="line.697"></a>
<span class="sourceLineNo">698</span> * The dataset to be copied<a name="line.698"></a>
<span class="sourceLineNo">699</span> * @param dtype dataset type<a name="line.699"></a>
<span class="sourceLineNo">700</span> * @return copied dataset of given type<a name="line.700"></a>
<span class="sourceLineNo">701</span> * @deprecated Please use the class-based methods in DatasetUtils,<a name="line.701"></a>
<span class="sourceLineNo">702</span> * such as {@link #copy(Class, IDataset)}<a name="line.702"></a>
<span class="sourceLineNo">703</span> */<a name="line.703"></a>
<span class="sourceLineNo">704</span> @Deprecated<a name="line.704"></a>
<span class="sourceLineNo">705</span> public static Dataset copy(final IDataset d, final int dtype) {<a name="line.705"></a>
<span class="sourceLineNo">706</span> return copy(DTypeUtils.getInterface(dtype), d);<a name="line.706"></a>
<span class="sourceLineNo">707</span> }<a name="line.707"></a>
<span class="sourceLineNo">708</span><a name="line.708"></a>
<span class="sourceLineNo">709</span> /**<a name="line.709"></a>
<span class="sourceLineNo">710</span> * Cast a dataset<a name="line.710"></a>
<span class="sourceLineNo">711</span> *<a name="line.711"></a>
<span class="sourceLineNo">712</span> * @param clazz dataset class<a name="line.712"></a>
<span class="sourceLineNo">713</span> * @param d<a name="line.713"></a>
<span class="sourceLineNo">714</span> * The dataset to be cast.<a name="line.714"></a>
<span class="sourceLineNo">715</span> * @return dataset of given class (or same dataset if already of the right class)<a name="line.715"></a>
<span class="sourceLineNo">716</span> */<a name="line.716"></a>
<span class="sourceLineNo">717</span> public static &lt;T extends Dataset&gt; T copy(Class&lt;T&gt; clazz, final IDataset d) {<a name="line.717"></a>
<span class="sourceLineNo">718</span> Dataset a = convertToDataset(d);<a name="line.718"></a>
<span class="sourceLineNo">719</span> Dataset c = null;<a name="line.719"></a>
<span class="sourceLineNo">720</span> try {<a name="line.720"></a>
<span class="sourceLineNo">721</span> // copy across the data<a name="line.721"></a>
<span class="sourceLineNo">722</span> if (BooleanDataset.class.equals(clazz)) {<a name="line.722"></a>
<span class="sourceLineNo">723</span> c = new BooleanDataset(a);<a name="line.723"></a>
<span class="sourceLineNo">724</span> } else if (ByteDataset.class.equals(clazz)) {<a name="line.724"></a>
<span class="sourceLineNo">725</span> c = new ByteDataset(a);<a name="line.725"></a>
<span class="sourceLineNo">726</span> } else if (ShortDataset.class.equals(clazz)) {<a name="line.726"></a>
<span class="sourceLineNo">727</span> c = new ShortDataset(a);<a name="line.727"></a>
<span class="sourceLineNo">728</span> } else if (IntegerDataset.class.equals(clazz)) {<a name="line.728"></a>
<span class="sourceLineNo">729</span> c = new IntegerDataset(a);<a name="line.729"></a>
<span class="sourceLineNo">730</span> } else if (LongDataset.class.equals(clazz)) {<a name="line.730"></a>
<span class="sourceLineNo">731</span> c = new LongDataset(a);<a name="line.731"></a>
<span class="sourceLineNo">732</span> } else if (CompoundByteDataset.class.equals(clazz)) {<a name="line.732"></a>
<span class="sourceLineNo">733</span> if (a instanceof CompoundByteDataset) {<a name="line.733"></a>
<span class="sourceLineNo">734</span> c = new CompoundByteDataset((CompoundDataset) a);<a name="line.734"></a>
<span class="sourceLineNo">735</span> } else {<a name="line.735"></a>
<span class="sourceLineNo">736</span> c = new CompoundByteDataset(a);<a name="line.736"></a>
<span class="sourceLineNo">737</span> }<a name="line.737"></a>
<span class="sourceLineNo">738</span> } else if (CompoundShortDataset.class.equals(clazz)) {<a name="line.738"></a>
<span class="sourceLineNo">739</span> if (a instanceof CompoundDataset) {<a name="line.739"></a>
<span class="sourceLineNo">740</span> c = new CompoundShortDataset((CompoundDataset) a);<a name="line.740"></a>
<span class="sourceLineNo">741</span> } else {<a name="line.741"></a>
<span class="sourceLineNo">742</span> c = new CompoundShortDataset(a);<a name="line.742"></a>
<span class="sourceLineNo">743</span> }<a name="line.743"></a>
<span class="sourceLineNo">744</span> } else if (CompoundIntegerDataset.class.equals(clazz)) {<a name="line.744"></a>
<span class="sourceLineNo">745</span> if (a instanceof CompoundDataset) {<a name="line.745"></a>
<span class="sourceLineNo">746</span> c = new CompoundIntegerDataset((CompoundDataset) a);<a name="line.746"></a>
<span class="sourceLineNo">747</span> } else {<a name="line.747"></a>
<span class="sourceLineNo">748</span> c = new CompoundIntegerDataset(a);<a name="line.748"></a>
<span class="sourceLineNo">749</span> }<a name="line.749"></a>
<span class="sourceLineNo">750</span> } else if (CompoundLongDataset.class.equals(clazz)) {<a name="line.750"></a>
<span class="sourceLineNo">751</span> if (a instanceof CompoundDataset) {<a name="line.751"></a>
<span class="sourceLineNo">752</span> c = new CompoundLongDataset((CompoundDataset) a);<a name="line.752"></a>
<span class="sourceLineNo">753</span> } else {<a name="line.753"></a>
<span class="sourceLineNo">754</span> c = new CompoundLongDataset(a);<a name="line.754"></a>
<span class="sourceLineNo">755</span> }<a name="line.755"></a>
<span class="sourceLineNo">756</span> } else if (FloatDataset.class.equals(clazz)) {<a name="line.756"></a>
<span class="sourceLineNo">757</span> c = new FloatDataset(a);<a name="line.757"></a>
<span class="sourceLineNo">758</span> } else if (DoubleDataset.class.equals(clazz)) {<a name="line.758"></a>
<span class="sourceLineNo">759</span> c = new DoubleDataset(a);<a name="line.759"></a>
<span class="sourceLineNo">760</span> } else if (CompoundFloatDataset.class.equals(clazz)) {<a name="line.760"></a>
<span class="sourceLineNo">761</span> if (a instanceof CompoundDataset) {<a name="line.761"></a>
<span class="sourceLineNo">762</span> c = new CompoundFloatDataset((CompoundDataset) a);<a name="line.762"></a>
<span class="sourceLineNo">763</span> } else {<a name="line.763"></a>
<span class="sourceLineNo">764</span> c = new CompoundFloatDataset(a);<a name="line.764"></a>
<span class="sourceLineNo">765</span> }<a name="line.765"></a>
<span class="sourceLineNo">766</span> } else if (CompoundDoubleDataset.class.equals(clazz)) {<a name="line.766"></a>
<span class="sourceLineNo">767</span> if (a instanceof CompoundDataset) {<a name="line.767"></a>
<span class="sourceLineNo">768</span> c = new CompoundDoubleDataset((CompoundDataset) a);<a name="line.768"></a>
<span class="sourceLineNo">769</span> } else {<a name="line.769"></a>
<span class="sourceLineNo">770</span> c = new CompoundDoubleDataset(a);<a name="line.770"></a>
<span class="sourceLineNo">771</span> }<a name="line.771"></a>
<span class="sourceLineNo">772</span> } else if (ComplexFloatDataset.class.equals(clazz)) {<a name="line.772"></a>
<span class="sourceLineNo">773</span> c = new ComplexFloatDataset(a);<a name="line.773"></a>
<span class="sourceLineNo">774</span> } else if (ComplexDoubleDataset.class.equals(clazz)) {<a name="line.774"></a>
<span class="sourceLineNo">775</span> c = new ComplexDoubleDataset(a);<a name="line.775"></a>
<span class="sourceLineNo">776</span> } else if (RGBDataset.class.equals(clazz)) {<a name="line.776"></a>
<span class="sourceLineNo">777</span> if (a instanceof CompoundDataset) {<a name="line.777"></a>
<span class="sourceLineNo">778</span> c = RGBDataset.createFromCompoundDataset((CompoundDataset) a);<a name="line.778"></a>
<span class="sourceLineNo">779</span> } else {<a name="line.779"></a>
<span class="sourceLineNo">780</span> c = new RGBDataset(a);<a name="line.780"></a>
<span class="sourceLineNo">781</span> }<a name="line.781"></a>
<span class="sourceLineNo">782</span> } else if (StringDataset.class.equals(clazz)) {<a name="line.782"></a>
<span class="sourceLineNo">783</span> c = new StringDataset(a);<a name="line.783"></a>
<span class="sourceLineNo">784</span> } else if (DateDataset.class.equals(clazz)) {<a name="line.784"></a>
<span class="sourceLineNo">785</span> c = DateDatasetImpl.createFromObject(a);<a name="line.785"></a>
<span class="sourceLineNo">786</span> } else if (ObjectDataset.class.equals(clazz)) {<a name="line.786"></a>
<span class="sourceLineNo">787</span> c = new ObjectDataset(a);<a name="line.787"></a>
<span class="sourceLineNo">788</span> } else {<a name="line.788"></a>
<span class="sourceLineNo">789</span> utilsLogger.error("Dataset of unknown type!");<a name="line.789"></a>
<span class="sourceLineNo">790</span> }<a name="line.790"></a>
<span class="sourceLineNo">791</span> } catch (OutOfMemoryError e) {<a name="line.791"></a>
<span class="sourceLineNo">792</span> utilsLogger.error("Not enough memory available to create dataset");<a name="line.792"></a>
<span class="sourceLineNo">793</span> throw new OutOfMemoryError("Not enough memory available to create dataset");<a name="line.793"></a>
<span class="sourceLineNo">794</span> }<a name="line.794"></a>
<span class="sourceLineNo">795</span><a name="line.795"></a>
<span class="sourceLineNo">796</span> return (T) c;<a name="line.796"></a>
<span class="sourceLineNo">797</span> }<a name="line.797"></a>
<span class="sourceLineNo">798</span><a name="line.798"></a>
<span class="sourceLineNo">799</span> /**<a name="line.799"></a>
<span class="sourceLineNo">800</span> * Cast a dataset<a name="line.800"></a>
<span class="sourceLineNo">801</span> *<a name="line.801"></a>
<span class="sourceLineNo">802</span> * @param d<a name="line.802"></a>
<span class="sourceLineNo">803</span> * The dataset to be cast.<a name="line.803"></a>
<span class="sourceLineNo">804</span> * @param dtype dataset type<a name="line.804"></a>
<span class="sourceLineNo">805</span> * @return dataset of given type (or same dataset if already of the right type)<a name="line.805"></a>
<span class="sourceLineNo">806</span> * @deprecated Please use the class-based methods in DatasetUtils,<a name="line.806"></a>
<span class="sourceLineNo">807</span> * such as {@link #cast(Class, IDataset)}<a name="line.807"></a>
<span class="sourceLineNo">808</span> */<a name="line.808"></a>
<span class="sourceLineNo">809</span> @Deprecated<a name="line.809"></a>
<span class="sourceLineNo">810</span> public static Dataset cast(final IDataset d, final int dtype) {<a name="line.810"></a>
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<span class="sourceLineNo">813</span><a name="line.813"></a>
<span class="sourceLineNo">814</span> /**<a name="line.814"></a>
<span class="sourceLineNo">815</span> * Cast a dataset<a name="line.815"></a>
<span class="sourceLineNo">816</span> * @param clazz dataset class<a name="line.816"></a>
<span class="sourceLineNo">817</span> * @param d<a name="line.817"></a>
<span class="sourceLineNo">818</span> * The dataset to be cast.<a name="line.818"></a>
<span class="sourceLineNo">819</span> * @return dataset of given class<a name="line.819"></a>
<span class="sourceLineNo">820</span> */<a name="line.820"></a>
<span class="sourceLineNo">821</span> public static &lt;T extends Dataset&gt; T cast(Class&lt;T&gt; clazz, final IDataset d) {<a name="line.821"></a>
<span class="sourceLineNo">822</span> Dataset a = convertToDataset(d);<a name="line.822"></a>
<span class="sourceLineNo">823</span><a name="line.823"></a>
<span class="sourceLineNo">824</span> if ((a.getClass().equals(clazz))) {<a name="line.824"></a>
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<span class="sourceLineNo">826</span> }<a name="line.826"></a>
<span class="sourceLineNo">827</span> return copy(clazz, d);<a name="line.827"></a>
<span class="sourceLineNo">828</span> }<a name="line.828"></a>
<span class="sourceLineNo">829</span><a name="line.829"></a>
<span class="sourceLineNo">830</span> /**<a name="line.830"></a>
<span class="sourceLineNo">831</span> * Cast a dataset<a name="line.831"></a>
<span class="sourceLineNo">832</span> *<a name="line.832"></a>
<span class="sourceLineNo">833</span> * @param d<a name="line.833"></a>
<span class="sourceLineNo">834</span> * The dataset to be cast.<a name="line.834"></a>
<span class="sourceLineNo">835</span> * @param repeat repeat elements over item<a name="line.835"></a>
<span class="sourceLineNo">836</span> * @param dtype dataset type<a name="line.836"></a>
<span class="sourceLineNo">837</span> * @param isize item size<a name="line.837"></a>
<span class="sourceLineNo">838</span> * @return dataset of given type<a name="line.838"></a>
<span class="sourceLineNo">839</span> * @deprecated Please use the class-based methods in DatasetUtils,<a name="line.839"></a>
<span class="sourceLineNo">840</span> * such as {@link #cast(Class, IDataset)}<a name="line.840"></a>
<span class="sourceLineNo">841</span> */<a name="line.841"></a>
<span class="sourceLineNo">842</span> @Deprecated<a name="line.842"></a>
<span class="sourceLineNo">843</span> public static Dataset cast(final IDataset d, final boolean repeat, final int dtype, final int isize) {<a name="line.843"></a>
<span class="sourceLineNo">844</span> return cast(isize, DTypeUtils.getInterface(dtype), d, repeat);<a name="line.844"></a>
<span class="sourceLineNo">845</span> }<a name="line.845"></a>
<span class="sourceLineNo">846</span><a name="line.846"></a>
<span class="sourceLineNo">847</span> /**<a name="line.847"></a>
<span class="sourceLineNo">848</span> * Cast a dataset<a name="line.848"></a>
<span class="sourceLineNo">849</span> *<a name="line.849"></a>
<span class="sourceLineNo">850</span> * @param clazz dataset class<a name="line.850"></a>
<span class="sourceLineNo">851</span> * @param d<a name="line.851"></a>
<span class="sourceLineNo">852</span> * The dataset to be cast.<a name="line.852"></a>
<span class="sourceLineNo">853</span> * @param repeat repeat elements over item<a name="line.853"></a>
<span class="sourceLineNo">854</span> * @param dtype dataset type<a name="line.854"></a>
<span class="sourceLineNo">855</span> * @param isize item size<a name="line.855"></a>
<span class="sourceLineNo">856</span> * @since 2.3<a name="line.856"></a>
<span class="sourceLineNo">857</span> */<a name="line.857"></a>
<span class="sourceLineNo">858</span> public static &lt;T extends Dataset&gt; T cast(final int isize, Class&lt;T&gt; clazz, final IDataset d, final boolean repeat) {<a name="line.858"></a>
<span class="sourceLineNo">859</span> Dataset a = convertToDataset(d);<a name="line.859"></a>
<span class="sourceLineNo">860</span><a name="line.860"></a>
<span class="sourceLineNo">861</span> if (a.getClass().equals(clazz) &amp;&amp; a.getElementsPerItem() == isize) {<a name="line.861"></a>
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<span class="sourceLineNo">863</span> }<a name="line.863"></a>
<span class="sourceLineNo">864</span> if (isize &lt;= 0) {<a name="line.864"></a>
<span class="sourceLineNo">865</span> utilsLogger.error("Item size is invalid (&gt;0)");<a name="line.865"></a>
<span class="sourceLineNo">866</span> throw new IllegalArgumentException("Item size is invalid (&gt;0)");<a name="line.866"></a>
<span class="sourceLineNo">867</span> }<a name="line.867"></a>
<span class="sourceLineNo">868</span> if (isize &gt; 1 &amp;&amp; !InterfaceUtils.isComplex(clazz) &amp;&amp; InterfaceUtils.isElemental(clazz)) {<a name="line.868"></a>
<span class="sourceLineNo">869</span> utilsLogger.error("Item size is inconsistent with dataset type");<a name="line.869"></a>
<span class="sourceLineNo">870</span> throw new IllegalArgumentException("Item size is inconsistent with dataset type");<a name="line.870"></a>
<span class="sourceLineNo">871</span> }<a name="line.871"></a>
<span class="sourceLineNo">872</span><a name="line.872"></a>
<span class="sourceLineNo">873</span> Dataset c = null;<a name="line.873"></a>
<span class="sourceLineNo">874</span><a name="line.874"></a>
<span class="sourceLineNo">875</span> try {<a name="line.875"></a>
<span class="sourceLineNo">876</span> // copy across the data<a name="line.876"></a>
<span class="sourceLineNo">877</span> if (BooleanDataset.class.equals(clazz)) {<a name="line.877"></a>
<span class="sourceLineNo">878</span> c = new BooleanDataset(a);<a name="line.878"></a>
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<span class="sourceLineNo">880</span> c = new ByteDataset(a);<a name="line.880"></a>
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<span class="sourceLineNo">882</span> c = new ShortDataset(a);<a name="line.882"></a>
<span class="sourceLineNo">883</span> } else if (IntegerDataset.class.equals(clazz)) {<a name="line.883"></a>
<span class="sourceLineNo">884</span> c = new IntegerDataset(a);<a name="line.884"></a>
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<span class="sourceLineNo">886</span> c = new LongDataset(a);<a name="line.886"></a>
<span class="sourceLineNo">887</span> } else if (CompoundByteDataset.class.equals(clazz)) {<a name="line.887"></a>
<span class="sourceLineNo">888</span> c = new CompoundByteDataset(isize, repeat, a);<a name="line.888"></a>
<span class="sourceLineNo">889</span> } else if (CompoundShortDataset.class.equals(clazz)) {<a name="line.889"></a>
<span class="sourceLineNo">890</span> c = new CompoundShortDataset(isize, repeat, a);<a name="line.890"></a>
<span class="sourceLineNo">891</span> } else if (CompoundIntegerDataset.class.equals(clazz)) {<a name="line.891"></a>
<span class="sourceLineNo">892</span> c = new CompoundIntegerDataset(isize, repeat, a);<a name="line.892"></a>
<span class="sourceLineNo">893</span> } else if (CompoundLongDataset.class.equals(clazz)) {<a name="line.893"></a>
<span class="sourceLineNo">894</span> c = new CompoundLongDataset(isize, repeat, a);<a name="line.894"></a>
<span class="sourceLineNo">895</span> } else if (FloatDataset.class.equals(clazz)) {<a name="line.895"></a>
<span class="sourceLineNo">896</span> c = new FloatDataset(a);<a name="line.896"></a>
<span class="sourceLineNo">897</span> } else if (DoubleDataset.class.equals(clazz)) {<a name="line.897"></a>
<span class="sourceLineNo">898</span> c = new DoubleDataset(a);<a name="line.898"></a>
<span class="sourceLineNo">899</span> } else if (CompoundFloatDataset.class.equals(clazz)) {<a name="line.899"></a>
<span class="sourceLineNo">900</span> c = new CompoundFloatDataset(isize, repeat, a);<a name="line.900"></a>
<span class="sourceLineNo">901</span> } else if (CompoundDoubleDataset.class.equals(clazz)) {<a name="line.901"></a>
<span class="sourceLineNo">902</span> c = new CompoundDoubleDataset(isize, repeat, a);<a name="line.902"></a>
<span class="sourceLineNo">903</span> } else if (ComplexFloatDataset.class.equals(clazz)) {<a name="line.903"></a>
<span class="sourceLineNo">904</span> c = new ComplexFloatDataset(a);<a name="line.904"></a>
<span class="sourceLineNo">905</span> } else if (ComplexDoubleDataset.class.equals(clazz)) {<a name="line.905"></a>
<span class="sourceLineNo">906</span> c = new ComplexDoubleDataset(a);<a name="line.906"></a>
<span class="sourceLineNo">907</span> } else if (RGBDataset.class.equals(clazz)) {<a name="line.907"></a>
<span class="sourceLineNo">908</span> if (a instanceof CompoundDataset) {<a name="line.908"></a>
<span class="sourceLineNo">909</span> c = RGBDataset.createFromCompoundDataset((CompoundDataset) a);<a name="line.909"></a>
<span class="sourceLineNo">910</span> } else {<a name="line.910"></a>
<span class="sourceLineNo">911</span> c = new RGBDataset(a);<a name="line.911"></a>
<span class="sourceLineNo">912</span> }<a name="line.912"></a>
<span class="sourceLineNo">913</span> } else if (StringDataset.class.equals(clazz)) {<a name="line.913"></a>
<span class="sourceLineNo">914</span> c = new StringDataset(a);<a name="line.914"></a>
<span class="sourceLineNo">915</span> } else if (DateDataset.class.equals(clazz)) {<a name="line.915"></a>
<span class="sourceLineNo">916</span> c = DateDatasetImpl.createFromObject(a);<a name="line.916"></a>
<span class="sourceLineNo">917</span> } else if (ObjectDataset.class.equals(clazz)) {<a name="line.917"></a>
<span class="sourceLineNo">918</span> c = new ObjectDataset(a);<a name="line.918"></a>
<span class="sourceLineNo">919</span> } else {<a name="line.919"></a>
<span class="sourceLineNo">920</span> utilsLogger.error("Dataset of unknown type!");<a name="line.920"></a>
<span class="sourceLineNo">921</span> }<a name="line.921"></a>
<span class="sourceLineNo">922</span> } catch (OutOfMemoryError e) {<a name="line.922"></a>
<span class="sourceLineNo">923</span> utilsLogger.error("Not enough memory available to create dataset");<a name="line.923"></a>
<span class="sourceLineNo">924</span> throw new OutOfMemoryError("Not enough memory available to create dataset");<a name="line.924"></a>
<span class="sourceLineNo">925</span> }<a name="line.925"></a>
<span class="sourceLineNo">926</span><a name="line.926"></a>
<span class="sourceLineNo">927</span> return (T) c;<a name="line.927"></a>
<span class="sourceLineNo">928</span> }<a name="line.928"></a>
<span class="sourceLineNo">929</span><a name="line.929"></a>
<span class="sourceLineNo">930</span> /**<a name="line.930"></a>
<span class="sourceLineNo">931</span> * Cast array of datasets to a compound dataset<a name="line.931"></a>
<span class="sourceLineNo">932</span> *<a name="line.932"></a>
<span class="sourceLineNo">933</span> * @param clazz dataset class<a name="line.933"></a>
<span class="sourceLineNo">934</span> * @param a<a name="line.934"></a>
<span class="sourceLineNo">935</span> * The datasets to be cast.<a name="line.935"></a>
<span class="sourceLineNo">936</span> * @return dataset of given class<a name="line.936"></a>
<span class="sourceLineNo">937</span> * @since 2.3<a name="line.937"></a>
<span class="sourceLineNo">938</span> */<a name="line.938"></a>
<span class="sourceLineNo">939</span> public static &lt;T extends CompoundDataset&gt; T compoundCast(Class&lt;T&gt; clazz, final Dataset... a) {<a name="line.939"></a>
<span class="sourceLineNo">940</span> return (T) cast((Class&lt;? extends Dataset&gt;) clazz, a);<a name="line.940"></a>
<span class="sourceLineNo">941</span> }<a name="line.941"></a>
<span class="sourceLineNo">942</span><a name="line.942"></a>
<span class="sourceLineNo">943</span><a name="line.943"></a>
<span class="sourceLineNo">944</span> /**<a name="line.944"></a>
<span class="sourceLineNo">945</span> * Cast array of datasets to a compound dataset<a name="line.945"></a>
<span class="sourceLineNo">946</span> *<a name="line.946"></a>
<span class="sourceLineNo">947</span> * @param clazz dataset class<a name="line.947"></a>
<span class="sourceLineNo">948</span> * @param a<a name="line.948"></a>
<span class="sourceLineNo">949</span> * The datasets to be cast.<a name="line.949"></a>
<span class="sourceLineNo">950</span> * @return compound dataset of given class<a name="line.950"></a>
<span class="sourceLineNo">951</span> * @since 2.3<a name="line.951"></a>
<span class="sourceLineNo">952</span> */<a name="line.952"></a>
<span class="sourceLineNo">953</span> public static CompoundDataset cast(Class&lt;? extends Dataset&gt; clazz, final Dataset... a) {<a name="line.953"></a>
<span class="sourceLineNo">954</span> CompoundDataset c = null;<a name="line.954"></a>
<span class="sourceLineNo">955</span> if (ByteDataset.class.equals(clazz) || CompoundByteDataset.class.equals(clazz)) {<a name="line.955"></a>
<span class="sourceLineNo">956</span> c = new CompoundByteDataset(a);<a name="line.956"></a>
<span class="sourceLineNo">957</span> } else if (ShortDataset.class.equals(clazz) || CompoundShortDataset.class.equals(clazz)) {<a name="line.957"></a>
<span class="sourceLineNo">958</span> c = new CompoundShortDataset(a);<a name="line.958"></a>
<span class="sourceLineNo">959</span> } else if (IntegerDataset.class.equals(clazz) || CompoundIntegerDataset.class.equals(clazz)) {<a name="line.959"></a>
<span class="sourceLineNo">960</span> c = new CompoundIntegerDataset(a);<a name="line.960"></a>
<span class="sourceLineNo">961</span> } else if (LongDataset.class.equals(clazz) || CompoundLongDataset.class.equals(clazz)) {<a name="line.961"></a>
<span class="sourceLineNo">962</span> c = new CompoundLongDataset(a);<a name="line.962"></a>
<span class="sourceLineNo">963</span> } else if (FloatDataset.class.equals(clazz) || CompoundFloatDataset.class.equals(clazz)) {<a name="line.963"></a>
<span class="sourceLineNo">964</span> c = new CompoundFloatDataset(a);<a name="line.964"></a>
<span class="sourceLineNo">965</span> } else if (DoubleDataset.class.equals(clazz) || CompoundDoubleDataset.class.equals(clazz)) {<a name="line.965"></a>
<span class="sourceLineNo">966</span> c = new CompoundDoubleDataset(a);<a name="line.966"></a>
<span class="sourceLineNo">967</span> } else if (ComplexFloatDataset.class.equals(clazz)) {<a name="line.967"></a>
<span class="sourceLineNo">968</span> if (a.length != 2) {<a name="line.968"></a>
<span class="sourceLineNo">969</span> throw new IllegalArgumentException("Need two datasets for complex dataset type");<a name="line.969"></a>
<span class="sourceLineNo">970</span> }<a name="line.970"></a>
<span class="sourceLineNo">971</span> c = new ComplexFloatDataset(a[0], a[1]);<a name="line.971"></a>
<span class="sourceLineNo">972</span> } else if (ComplexDoubleDataset.class.equals(clazz)) {<a name="line.972"></a>
<span class="sourceLineNo">973</span> if (a.length != 2) {<a name="line.973"></a>
<span class="sourceLineNo">974</span> throw new IllegalArgumentException("Need two datasets for complex dataset type");<a name="line.974"></a>
<span class="sourceLineNo">975</span> }<a name="line.975"></a>
<span class="sourceLineNo">976</span> c = new ComplexDoubleDataset(a[0], a[1]);<a name="line.976"></a>
<span class="sourceLineNo">977</span> } else {<a name="line.977"></a>
<span class="sourceLineNo">978</span> utilsLogger.error("Dataset of unsupported type!");<a name="line.978"></a>
<span class="sourceLineNo">979</span> }<a name="line.979"></a>
<span class="sourceLineNo">980</span><a name="line.980"></a>
<span class="sourceLineNo">981</span> return c;<a name="line.981"></a>
<span class="sourceLineNo">982</span> }<a name="line.982"></a>
<span class="sourceLineNo">983</span><a name="line.983"></a>
<span class="sourceLineNo">984</span> /**<a name="line.984"></a>
<span class="sourceLineNo">985</span> * Cast array of datasets to a compound dataset<a name="line.985"></a>
<span class="sourceLineNo">986</span> *<a name="line.986"></a>
<span class="sourceLineNo">987</span> * @param a<a name="line.987"></a>
<span class="sourceLineNo">988</span> * The datasets to be cast.<a name="line.988"></a>
<span class="sourceLineNo">989</span> * @return compound dataset of given type<a name="line.989"></a>
<span class="sourceLineNo">990</span> * @deprecated Please use the class-based methods in DatasetUtils,<a name="line.990"></a>
<span class="sourceLineNo">991</span> * such as {@link #cast(Class, Dataset...)}<a name="line.991"></a>
<span class="sourceLineNo">992</span> */<a name="line.992"></a>
<span class="sourceLineNo">993</span> @Deprecated<a name="line.993"></a>
<span class="sourceLineNo">994</span> public static CompoundDataset cast(final Dataset[] a, final int dtype) {<a name="line.994"></a>
<span class="sourceLineNo">995</span> return cast(DTypeUtils.getInterface(dtype), a);<a name="line.995"></a>
<span class="sourceLineNo">996</span> }<a name="line.996"></a>
<span class="sourceLineNo">997</span><a name="line.997"></a>
<span class="sourceLineNo">998</span> /**<a name="line.998"></a>
<span class="sourceLineNo">999</span> * Make a dataset unsigned by promoting it to a wider dataset type and unwrapping the signs<a name="line.999"></a>
<span class="sourceLineNo">1000</span> * of its contents<a name="line.1000"></a>
<span class="sourceLineNo">1001</span> * @param a<a name="line.1001"></a>
<span class="sourceLineNo">1002</span> * @return unsigned dataset or original if it is not an integer dataset<a name="line.1002"></a>
<span class="sourceLineNo">1003</span> */<a name="line.1003"></a>
<span class="sourceLineNo">1004</span> public static Dataset makeUnsigned(IDataset a) {<a name="line.1004"></a>
<span class="sourceLineNo">1005</span> return makeUnsigned(a, false);<a name="line.1005"></a>
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<span class="sourceLineNo">1007</span><a name="line.1007"></a>
<span class="sourceLineNo">1008</span> /**<a name="line.1008"></a>
<span class="sourceLineNo">1009</span> * Make a dataset unsigned by promoting it to a wider dataset type and unwrapping the signs<a name="line.1009"></a>
<span class="sourceLineNo">1010</span> * of its contents<a name="line.1010"></a>
<span class="sourceLineNo">1011</span> * @param a<a name="line.1011"></a>
<span class="sourceLineNo">1012</span> * @param check if true, then check for negative values<a name="line.1012"></a>
<span class="sourceLineNo">1013</span> * @return unsigned dataset or original if it is not an integer dataset or it has been check for negative numbers<a name="line.1013"></a>
<span class="sourceLineNo">1014</span> * @since 2.1<a name="line.1014"></a>
<span class="sourceLineNo">1015</span> */<a name="line.1015"></a>
<span class="sourceLineNo">1016</span> public static Dataset makeUnsigned(IDataset a, boolean check) {<a name="line.1016"></a>
<span class="sourceLineNo">1017</span> Dataset d = convertToDataset(a);<a name="line.1017"></a>
<span class="sourceLineNo">1018</span><a name="line.1018"></a>
<span class="sourceLineNo">1019</span> if (d.hasFloatingPointElements()) {<a name="line.1019"></a>
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<span class="sourceLineNo">1026</span> int dtype = d.getDType();<a name="line.1026"></a>
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<span class="sourceLineNo">1029</span> d = new LongDataset(d);<a name="line.1029"></a>
<span class="sourceLineNo">1030</span> unwrapUnsigned(d, 32);<a name="line.1030"></a>
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<span class="sourceLineNo">1032</span> case Dataset.INT16:<a name="line.1032"></a>
<span class="sourceLineNo">1033</span> d = new IntegerDataset(d);<a name="line.1033"></a>
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<span class="sourceLineNo">1036</span> case Dataset.INT8:<a name="line.1036"></a>
<span class="sourceLineNo">1037</span> d = new ShortDataset(d);<a name="line.1037"></a>
<span class="sourceLineNo">1038</span> unwrapUnsigned(d, 8);<a name="line.1038"></a>
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<span class="sourceLineNo">1040</span> case Dataset.ARRAYINT32:<a name="line.1040"></a>
<span class="sourceLineNo">1041</span> d = new CompoundLongDataset(d);<a name="line.1041"></a>
<span class="sourceLineNo">1042</span> unwrapUnsigned(d, 32);<a name="line.1042"></a>
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<span class="sourceLineNo">1044</span> case Dataset.ARRAYINT16:<a name="line.1044"></a>
<span class="sourceLineNo">1045</span> d = new CompoundIntegerDataset(d);<a name="line.1045"></a>
<span class="sourceLineNo">1046</span> unwrapUnsigned(d, 16);<a name="line.1046"></a>
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<span class="sourceLineNo">1048</span> case Dataset.ARRAYINT8:<a name="line.1048"></a>
<span class="sourceLineNo">1049</span> d = new CompoundShortDataset(d);<a name="line.1049"></a>
<span class="sourceLineNo">1050</span> unwrapUnsigned(d, 8);<a name="line.1050"></a>
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<span class="sourceLineNo">1052</span> }<a name="line.1052"></a>
<span class="sourceLineNo">1053</span> return d;<a name="line.1053"></a>
<span class="sourceLineNo">1054</span> }<a name="line.1054"></a>
<span class="sourceLineNo">1055</span><a name="line.1055"></a>
<span class="sourceLineNo">1056</span> /**<a name="line.1056"></a>
<span class="sourceLineNo">1057</span> * Unwrap dataset elements so that all elements are unsigned<a name="line.1057"></a>
<span class="sourceLineNo">1058</span> * @param a dataset<a name="line.1058"></a>
<span class="sourceLineNo">1059</span> * @param bitWidth width of original primitive in bits<a name="line.1059"></a>
<span class="sourceLineNo">1060</span> */<a name="line.1060"></a>
<span class="sourceLineNo">1061</span> public static void unwrapUnsigned(Dataset a, final int bitWidth) {<a name="line.1061"></a>
<span class="sourceLineNo">1062</span> final int dtype = a.getDType();<a name="line.1062"></a>
<span class="sourceLineNo">1063</span> final double dv = 1L &lt;&lt; bitWidth;<a name="line.1063"></a>
<span class="sourceLineNo">1064</span> final int isize = a.getElementsPerItem();<a name="line.1064"></a>
<span class="sourceLineNo">1065</span> IndexIterator it = a.getIterator();<a name="line.1065"></a>
<span class="sourceLineNo">1066</span><a name="line.1066"></a>
<span class="sourceLineNo">1067</span> switch (dtype) {<a name="line.1067"></a>
<span class="sourceLineNo">1068</span> case Dataset.BOOL:<a name="line.1068"></a>
<span class="sourceLineNo">1069</span> break;<a name="line.1069"></a>
<span class="sourceLineNo">1070</span> case Dataset.INT8:<a name="line.1070"></a>
<span class="sourceLineNo">1071</span> break;<a name="line.1071"></a>
<span class="sourceLineNo">1072</span> case Dataset.INT16:<a name="line.1072"></a>
<span class="sourceLineNo">1073</span> ShortDataset sds = (ShortDataset) a;<a name="line.1073"></a>
<span class="sourceLineNo">1074</span> final short soffset = (short) dv;<a name="line.1074"></a>
<span class="sourceLineNo">1075</span> while (it.hasNext()) {<a name="line.1075"></a>
<span class="sourceLineNo">1076</span> final short x = sds.getAbs(it.index);<a name="line.1076"></a>
<span class="sourceLineNo">1077</span> if (x &lt; 0)<a name="line.1077"></a>
<span class="sourceLineNo">1078</span> sds.setAbs(it.index, (short) (x + soffset));<a name="line.1078"></a>
<span class="sourceLineNo">1079</span> }<a name="line.1079"></a>
<span class="sourceLineNo">1080</span> break;<a name="line.1080"></a>
<span class="sourceLineNo">1081</span> case Dataset.INT32:<a name="line.1081"></a>
<span class="sourceLineNo">1082</span> IntegerDataset ids = (IntegerDataset) a;<a name="line.1082"></a>
<span class="sourceLineNo">1083</span> final int ioffset = (int) dv;<a name="line.1083"></a>
<span class="sourceLineNo">1084</span> while (it.hasNext()) {<a name="line.1084"></a>
<span class="sourceLineNo">1085</span> final int x = ids.getAbs(it.index);<a name="line.1085"></a>
<span class="sourceLineNo">1086</span> if (x &lt; 0)<a name="line.1086"></a>
<span class="sourceLineNo">1087</span> ids.setAbs(it.index, x + ioffset);<a name="line.1087"></a>
<span class="sourceLineNo">1088</span> }<a name="line.1088"></a>
<span class="sourceLineNo">1089</span> break;<a name="line.1089"></a>
<span class="sourceLineNo">1090</span> case Dataset.INT64:<a name="line.1090"></a>
<span class="sourceLineNo">1091</span> LongDataset lds = (LongDataset) a;<a name="line.1091"></a>
<span class="sourceLineNo">1092</span> final long loffset = (long) dv;<a name="line.1092"></a>
<span class="sourceLineNo">1093</span> while (it.hasNext()) {<a name="line.1093"></a>
<span class="sourceLineNo">1094</span> final long x = lds.getAbs(it.index);<a name="line.1094"></a>
<span class="sourceLineNo">1095</span> if (x &lt; 0)<a name="line.1095"></a>
<span class="sourceLineNo">1096</span> lds.setAbs(it.index, x + loffset);<a name="line.1096"></a>
<span class="sourceLineNo">1097</span> }<a name="line.1097"></a>
<span class="sourceLineNo">1098</span> break;<a name="line.1098"></a>
<span class="sourceLineNo">1099</span> case Dataset.FLOAT32:<a name="line.1099"></a>
<span class="sourceLineNo">1100</span> FloatDataset fds = (FloatDataset) a;<a name="line.1100"></a>
<span class="sourceLineNo">1101</span> final float foffset = (float) dv;<a name="line.1101"></a>
<span class="sourceLineNo">1102</span> while (it.hasNext()) {<a name="line.1102"></a>
<span class="sourceLineNo">1103</span> final float x = fds.getAbs(it.index);<a name="line.1103"></a>
<span class="sourceLineNo">1104</span> if (x &lt; 0)<a name="line.1104"></a>
<span class="sourceLineNo">1105</span> fds.setAbs(it.index, x + foffset);<a name="line.1105"></a>
<span class="sourceLineNo">1106</span> }<a name="line.1106"></a>
<span class="sourceLineNo">1107</span> break;<a name="line.1107"></a>
<span class="sourceLineNo">1108</span> case Dataset.FLOAT64:<a name="line.1108"></a>
<span class="sourceLineNo">1109</span> DoubleDataset dds = (DoubleDataset) a;<a name="line.1109"></a>
<span class="sourceLineNo">1110</span> final double doffset = dv;<a name="line.1110"></a>
<span class="sourceLineNo">1111</span> while (it.hasNext()) {<a name="line.1111"></a>
<span class="sourceLineNo">1112</span> final double x = dds.getAbs(it.index);<a name="line.1112"></a>
<span class="sourceLineNo">1113</span> if (x &lt; 0)<a name="line.1113"></a>
<span class="sourceLineNo">1114</span> dds.setAbs(it.index, x + doffset);<a name="line.1114"></a>
<span class="sourceLineNo">1115</span> }<a name="line.1115"></a>
<span class="sourceLineNo">1116</span> break;<a name="line.1116"></a>
<span class="sourceLineNo">1117</span> case Dataset.ARRAYINT8:<a name="line.1117"></a>
<span class="sourceLineNo">1118</span> break;<a name="line.1118"></a>
<span class="sourceLineNo">1119</span> case Dataset.ARRAYINT16:<a name="line.1119"></a>
<span class="sourceLineNo">1120</span> CompoundShortDataset csds = (CompoundShortDataset) a;<a name="line.1120"></a>
<span class="sourceLineNo">1121</span> final short csoffset = (short) dv;<a name="line.1121"></a>
<span class="sourceLineNo">1122</span> final short[] csa = new short[isize];<a name="line.1122"></a>
<span class="sourceLineNo">1123</span> while (it.hasNext()) {<a name="line.1123"></a>
<span class="sourceLineNo">1124</span> csds.getAbs(it.index, csa);<a name="line.1124"></a>
<span class="sourceLineNo">1125</span> boolean dirty = false;<a name="line.1125"></a>
<span class="sourceLineNo">1126</span> for (int i = 0; i &lt; isize; i++) {<a name="line.1126"></a>
<span class="sourceLineNo">1127</span> short x = csa[i];<a name="line.1127"></a>
<span class="sourceLineNo">1128</span> if (x &lt; 0) {<a name="line.1128"></a>
<span class="sourceLineNo">1129</span> csa[i] = (short) (x + csoffset);<a name="line.1129"></a>
<span class="sourceLineNo">1130</span> dirty = true;<a name="line.1130"></a>
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<span class="sourceLineNo">1132</span> }<a name="line.1132"></a>
<span class="sourceLineNo">1133</span> if (dirty)<a name="line.1133"></a>
<span class="sourceLineNo">1134</span> csds.setAbs(it.index, csa);<a name="line.1134"></a>
<span class="sourceLineNo">1135</span> }<a name="line.1135"></a>
<span class="sourceLineNo">1136</span> break;<a name="line.1136"></a>
<span class="sourceLineNo">1137</span> case Dataset.ARRAYINT32:<a name="line.1137"></a>
<span class="sourceLineNo">1138</span> CompoundIntegerDataset cids = (CompoundIntegerDataset) a;<a name="line.1138"></a>
<span class="sourceLineNo">1139</span> final int cioffset = (int) dv;<a name="line.1139"></a>
<span class="sourceLineNo">1140</span> final int[] cia = new int[isize];<a name="line.1140"></a>
<span class="sourceLineNo">1141</span> while (it.hasNext()) {<a name="line.1141"></a>
<span class="sourceLineNo">1142</span> cids.getAbs(it.index, cia);<a name="line.1142"></a>
<span class="sourceLineNo">1143</span> boolean dirty = false;<a name="line.1143"></a>
<span class="sourceLineNo">1144</span> for (int i = 0; i &lt; isize; i++) {<a name="line.1144"></a>
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<span class="sourceLineNo">1146</span> if (x &lt; 0) {<a name="line.1146"></a>
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<span class="sourceLineNo">1148</span> dirty = true;<a name="line.1148"></a>
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<span class="sourceLineNo">1150</span> }<a name="line.1150"></a>
<span class="sourceLineNo">1151</span> if (dirty)<a name="line.1151"></a>
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<span class="sourceLineNo">1154</span> break;<a name="line.1154"></a>
<span class="sourceLineNo">1155</span> case Dataset.ARRAYINT64:<a name="line.1155"></a>
<span class="sourceLineNo">1156</span> CompoundLongDataset clds = (CompoundLongDataset) a;<a name="line.1156"></a>
<span class="sourceLineNo">1157</span> final long cloffset = (long) dv;<a name="line.1157"></a>
<span class="sourceLineNo">1158</span> final long[] cla = new long[isize];<a name="line.1158"></a>
<span class="sourceLineNo">1159</span> while (it.hasNext()) {<a name="line.1159"></a>
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<span class="sourceLineNo">1161</span> boolean dirty = false;<a name="line.1161"></a>
<span class="sourceLineNo">1162</span> for (int i = 0; i &lt; isize; i++) {<a name="line.1162"></a>
<span class="sourceLineNo">1163</span> long x = cla[i];<a name="line.1163"></a>
<span class="sourceLineNo">1164</span> if (x &lt; 0) {<a name="line.1164"></a>
<span class="sourceLineNo">1165</span> cla[i] = x + cloffset;<a name="line.1165"></a>
<span class="sourceLineNo">1166</span> dirty = true;<a name="line.1166"></a>
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<span class="sourceLineNo">1169</span> if (dirty)<a name="line.1169"></a>
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<span class="sourceLineNo">1172</span> break;<a name="line.1172"></a>
<span class="sourceLineNo">1173</span> default:<a name="line.1173"></a>
<span class="sourceLineNo">1174</span> utilsLogger.error("Dataset of unsupported type for this method");<a name="line.1174"></a>
<span class="sourceLineNo">1175</span> break;<a name="line.1175"></a>
<span class="sourceLineNo">1176</span> }<a name="line.1176"></a>
<span class="sourceLineNo">1177</span> }<a name="line.1177"></a>
<span class="sourceLineNo">1178</span><a name="line.1178"></a>
<span class="sourceLineNo">1179</span> /**<a name="line.1179"></a>
<span class="sourceLineNo">1180</span> * @param clazz dataset class<a name="line.1180"></a>
<span class="sourceLineNo">1181</span> * @param rows<a name="line.1181"></a>
<span class="sourceLineNo">1182</span> * @param cols<a name="line.1182"></a>
<span class="sourceLineNo">1183</span> * @param offset<a name="line.1183"></a>
<span class="sourceLineNo">1184</span> * @param dtype<a name="line.1184"></a>
<span class="sourceLineNo">1185</span> * @return a new 2d dataset of given shape and class, filled with ones on the (offset) diagonal<a name="line.1185"></a>
<span class="sourceLineNo">1186</span> * @since 2.3<a name="line.1186"></a>
<span class="sourceLineNo">1187</span> */<a name="line.1187"></a>
<span class="sourceLineNo">1188</span> public static &lt;T extends Dataset&gt; T eye(final Class&lt;T&gt; clazz, final int rows, final int cols, final int offset) {<a name="line.1188"></a>
<span class="sourceLineNo">1189</span> int[] shape = new int[] {rows, cols};<a name="line.1189"></a>
<span class="sourceLineNo">1190</span> T a = DatasetFactory.zeros(clazz, shape);<a name="line.1190"></a>
<span class="sourceLineNo">1191</span><a name="line.1191"></a>
<span class="sourceLineNo">1192</span> int[] pos = new int[] {0, offset};<a name="line.1192"></a>
<span class="sourceLineNo">1193</span> while (pos[1] &lt; 0) {<a name="line.1193"></a>
<span class="sourceLineNo">1194</span> pos[0]++;<a name="line.1194"></a>
<span class="sourceLineNo">1195</span> pos[1]++;<a name="line.1195"></a>
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<span class="sourceLineNo">1197</span> while (pos[0] &lt; rows &amp;&amp; pos[1] &lt; cols) {<a name="line.1197"></a>
<span class="sourceLineNo">1198</span> a.set(1, pos);<a name="line.1198"></a>
<span class="sourceLineNo">1199</span> pos[0]++;<a name="line.1199"></a>
<span class="sourceLineNo">1200</span> pos[1]++;<a name="line.1200"></a>
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<span class="sourceLineNo">1202</span><a name="line.1202"></a>
<span class="sourceLineNo">1203</span> return a;<a name="line.1203"></a>
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<span class="sourceLineNo">1205</span><a name="line.1205"></a>
<span class="sourceLineNo">1206</span> /**<a name="line.1206"></a>
<span class="sourceLineNo">1207</span> * @param rows<a name="line.1207"></a>
<span class="sourceLineNo">1208</span> * @param cols<a name="line.1208"></a>
<span class="sourceLineNo">1209</span> * @param offset<a name="line.1209"></a>
<span class="sourceLineNo">1210</span> * @param dtype<a name="line.1210"></a>
<span class="sourceLineNo">1211</span> * @return a new 2d dataset of given shape and type, filled with ones on the (offset) diagonal<a name="line.1211"></a>
<span class="sourceLineNo">1212</span> * @deprecated Please use the class-based methods in DatasetUtils,<a name="line.1212"></a>
<span class="sourceLineNo">1213</span> * such as {@link #eye(Class, int, int, int)}<a name="line.1213"></a>
<span class="sourceLineNo">1214</span> */<a name="line.1214"></a>
<span class="sourceLineNo">1215</span> @Deprecated<a name="line.1215"></a>
<span class="sourceLineNo">1216</span> public static Dataset eye(final int rows, final int cols, final int offset, final int dtype) {<a name="line.1216"></a>
<span class="sourceLineNo">1217</span> int[] shape = new int[] {rows, cols};<a name="line.1217"></a>
<span class="sourceLineNo">1218</span> Dataset a = DatasetFactory.zeros(shape, dtype);<a name="line.1218"></a>
<span class="sourceLineNo">1219</span><a name="line.1219"></a>
<span class="sourceLineNo">1220</span> int[] pos = new int[] {0, offset};<a name="line.1220"></a>
<span class="sourceLineNo">1221</span> while (pos[1] &lt; 0) {<a name="line.1221"></a>
<span class="sourceLineNo">1222</span> pos[0]++;<a name="line.1222"></a>
<span class="sourceLineNo">1223</span> pos[1]++;<a name="line.1223"></a>
<span class="sourceLineNo">1224</span> }<a name="line.1224"></a>
<span class="sourceLineNo">1225</span> while (pos[0] &lt; rows &amp;&amp; pos[1] &lt; cols) {<a name="line.1225"></a>
<span class="sourceLineNo">1226</span> a.set(1, pos);<a name="line.1226"></a>
<span class="sourceLineNo">1227</span> pos[0]++;<a name="line.1227"></a>
<span class="sourceLineNo">1228</span> pos[1]++;<a name="line.1228"></a>
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<span class="sourceLineNo">1230</span><a name="line.1230"></a>
<span class="sourceLineNo">1231</span> return a;<a name="line.1231"></a>
<span class="sourceLineNo">1232</span> }<a name="line.1232"></a>
<span class="sourceLineNo">1233</span><a name="line.1233"></a>
<span class="sourceLineNo">1234</span> /**<a name="line.1234"></a>
<span class="sourceLineNo">1235</span> * Create a (off-)diagonal matrix from items in dataset<a name="line.1235"></a>
<span class="sourceLineNo">1236</span> * @param a<a name="line.1236"></a>
<span class="sourceLineNo">1237</span> * @param offset<a name="line.1237"></a>
<span class="sourceLineNo">1238</span> * @return diagonal matrix<a name="line.1238"></a>
<span class="sourceLineNo">1239</span> */<a name="line.1239"></a>
<span class="sourceLineNo">1240</span> public static &lt;T extends Dataset&gt; T diag(final T a, final int offset) {<a name="line.1240"></a>
<span class="sourceLineNo">1241</span> final int rank = a.getRank();<a name="line.1241"></a>
<span class="sourceLineNo">1242</span> final int is = a.getElementsPerItem();<a name="line.1242"></a>
<span class="sourceLineNo">1243</span><a name="line.1243"></a>
<span class="sourceLineNo">1244</span> if (rank == 0 || rank &gt; 2) {<a name="line.1244"></a>
<span class="sourceLineNo">1245</span> utilsLogger.error("Rank of dataset should be one or two");<a name="line.1245"></a>
<span class="sourceLineNo">1246</span> throw new IllegalArgumentException("Rank of dataset should be one or two");<a name="line.1246"></a>
<span class="sourceLineNo">1247</span> }<a name="line.1247"></a>
<span class="sourceLineNo">1248</span><a name="line.1248"></a>
<span class="sourceLineNo">1249</span> Dataset result;<a name="line.1249"></a>
<span class="sourceLineNo">1250</span> final int[] shape = a.getShapeRef();<a name="line.1250"></a>
<span class="sourceLineNo">1251</span> if (rank == 1) {<a name="line.1251"></a>
<span class="sourceLineNo">1252</span> int side = shape[0] + Math.abs(offset);<a name="line.1252"></a>
<span class="sourceLineNo">1253</span> int[] pos = new int[] {side, side};<a name="line.1253"></a>
<span class="sourceLineNo">1254</span> result = DatasetFactory.zeros(is, a.getClass(), pos);<a name="line.1254"></a>
<span class="sourceLineNo">1255</span> if (offset &gt;= 0) {<a name="line.1255"></a>
<span class="sourceLineNo">1256</span> pos[0] = 0;<a name="line.1256"></a>
<span class="sourceLineNo">1257</span> pos[1] = offset;<a name="line.1257"></a>
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<span class="sourceLineNo">1259</span> pos[0] = -offset;<a name="line.1259"></a>
<span class="sourceLineNo">1260</span> pos[1] = 0;<a name="line.1260"></a>
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<span class="sourceLineNo">1262</span> int i = 0;<a name="line.1262"></a>
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<span class="sourceLineNo">1264</span> result.set(a.getObject(i++), pos);<a name="line.1264"></a>
<span class="sourceLineNo">1265</span> pos[0]++;<a name="line.1265"></a>
<span class="sourceLineNo">1266</span> pos[1]++;<a name="line.1266"></a>
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<span class="sourceLineNo">1269</span> int side = offset &gt;= 0 ? Math.min(shape[0], shape[1]-offset) : Math.min(shape[0]+offset, shape[1]);<a name="line.1269"></a>
<span class="sourceLineNo">1270</span> if (side &lt; 0)<a name="line.1270"></a>
<span class="sourceLineNo">1271</span> side = 0;<a name="line.1271"></a>
<span class="sourceLineNo">1272</span> result = DatasetFactory.zeros(is, a.getClass(), side);<a name="line.1272"></a>
<span class="sourceLineNo">1273</span><a name="line.1273"></a>
<span class="sourceLineNo">1274</span> if (side &gt; 0) {<a name="line.1274"></a>
<span class="sourceLineNo">1275</span> int[] pos = offset &gt;= 0 ? new int[] { 0, offset } : new int[] { -offset, 0 };<a name="line.1275"></a>
<span class="sourceLineNo">1276</span> int i = 0;<a name="line.1276"></a>
<span class="sourceLineNo">1277</span> while (pos[0] &lt; shape[0] &amp;&amp; pos[1] &lt; shape[1]) {<a name="line.1277"></a>
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<span class="sourceLineNo">1279</span> pos[0]++;<a name="line.1279"></a>
<span class="sourceLineNo">1280</span> pos[1]++;<a name="line.1280"></a>
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<span class="sourceLineNo">1282</span> }<a name="line.1282"></a>
<span class="sourceLineNo">1283</span> }<a name="line.1283"></a>
<span class="sourceLineNo">1284</span><a name="line.1284"></a>
<span class="sourceLineNo">1285</span> return (T) result;<a name="line.1285"></a>
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<span class="sourceLineNo">1287</span><a name="line.1287"></a>
<span class="sourceLineNo">1288</span> /**<a name="line.1288"></a>
<span class="sourceLineNo">1289</span> * Slice (or fully load), if necessary, a lazy dataset, otherwise take a slice view and<a name="line.1289"></a>
<span class="sourceLineNo">1290</span> * convert to our dataset implementation. If a slice is necessary, this may cause resource<a name="line.1290"></a>
<span class="sourceLineNo">1291</span> * problems when used on large datasets and throw runtime exceptions<a name="line.1291"></a>
<span class="sourceLineNo">1292</span> * @param lazy can be null<a name="line.1292"></a>
<span class="sourceLineNo">1293</span> * @return Converted dataset or null<a name="line.1293"></a>
<span class="sourceLineNo">1294</span> * @throws DatasetException<a name="line.1294"></a>
<span class="sourceLineNo">1295</span> */<a name="line.1295"></a>
<span class="sourceLineNo">1296</span> public static Dataset sliceAndConvertLazyDataset(ILazyDataset lazy) throws DatasetException {<a name="line.1296"></a>
<span class="sourceLineNo">1297</span> if (lazy == null)<a name="line.1297"></a>
<span class="sourceLineNo">1298</span> return null;<a name="line.1298"></a>
<span class="sourceLineNo">1299</span><a name="line.1299"></a>
<span class="sourceLineNo">1300</span> IDataset data = lazy instanceof IDataset ? (IDataset) lazy.getSliceView() : lazy.getSlice();<a name="line.1300"></a>
<span class="sourceLineNo">1301</span><a name="line.1301"></a>
<span class="sourceLineNo">1302</span> return convertToDataset(data);<a name="line.1302"></a>
<span class="sourceLineNo">1303</span> }<a name="line.1303"></a>
<span class="sourceLineNo">1304</span><a name="line.1304"></a>
<span class="sourceLineNo">1305</span> /**<a name="line.1305"></a>
<span class="sourceLineNo">1306</span> * Convert (if necessary) a dataset obeying the interface to our implementation<a name="line.1306"></a>
<span class="sourceLineNo">1307</span> * @param data can be null<a name="line.1307"></a>
<span class="sourceLineNo">1308</span> * @return Converted dataset or null<a name="line.1308"></a>
<span class="sourceLineNo">1309</span> */<a name="line.1309"></a>
<span class="sourceLineNo">1310</span> public static Dataset convertToDataset(IDataset data) {<a name="line.1310"></a>
<span class="sourceLineNo">1311</span> if (data == null)<a name="line.1311"></a>
<span class="sourceLineNo">1312</span> return null;<a name="line.1312"></a>
<span class="sourceLineNo">1313</span><a name="line.1313"></a>
<span class="sourceLineNo">1314</span> if (data instanceof Dataset) {<a name="line.1314"></a>
<span class="sourceLineNo">1315</span> return (Dataset) data;<a name="line.1315"></a>
<span class="sourceLineNo">1316</span> }<a name="line.1316"></a>
<span class="sourceLineNo">1317</span><a name="line.1317"></a>
<span class="sourceLineNo">1318</span> final int isize = data.getElementsPerItem();<a name="line.1318"></a>
<span class="sourceLineNo">1319</span> Class&lt;? extends Dataset&gt; clazz = InterfaceUtils.getInterfaceFromClass(isize, data.getElementClass());<a name="line.1319"></a>
<span class="sourceLineNo">1320</span> if (isize &lt;= 0) {<a name="line.1320"></a>
<span class="sourceLineNo">1321</span> throw new IllegalArgumentException("Datasets with " + isize + " elements per item not supported");<a name="line.1321"></a>
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<span class="sourceLineNo">1323</span><a name="line.1323"></a>
<span class="sourceLineNo">1324</span> final Dataset result = DatasetFactory.zeros(isize, clazz, data.getShape());<a name="line.1324"></a>
<span class="sourceLineNo">1325</span> result.setName(data.getName());<a name="line.1325"></a>
<span class="sourceLineNo">1326</span><a name="line.1326"></a>
<span class="sourceLineNo">1327</span> final IndexIterator it = result.getIterator(true);<a name="line.1327"></a>
<span class="sourceLineNo">1328</span> final int[] pos = it.getPos();<a name="line.1328"></a>
<span class="sourceLineNo">1329</span> switch (DTypeUtils.getDType(clazz)) {<a name="line.1329"></a>
<span class="sourceLineNo">1330</span> case Dataset.BOOL:<a name="line.1330"></a>
<span class="sourceLineNo">1331</span> while (it.hasNext()) {<a name="line.1331"></a>
<span class="sourceLineNo">1332</span> result.setObjectAbs(it.index, data.getBoolean(pos));<a name="line.1332"></a>
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<span class="sourceLineNo">1337</span> result.setObjectAbs(it.index, data.getByte(pos));<a name="line.1337"></a>
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<span class="sourceLineNo">1342</span> result.setObjectAbs(it.index, data.getShort(pos));<a name="line.1342"></a>
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<span class="sourceLineNo">1347</span> result.setObjectAbs(it.index, data.getInt(pos));<a name="line.1347"></a>
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<span class="sourceLineNo">1352</span> result.setObjectAbs(it.index, data.getLong(pos));<a name="line.1352"></a>
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<span class="sourceLineNo">1357</span> result.setObjectAbs(it.index, data.getFloat(pos));<a name="line.1357"></a>
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<span class="sourceLineNo">1362</span> result.setObjectAbs(it.index, data.getDouble(pos));<a name="line.1362"></a>
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<span class="sourceLineNo">1365</span> default:<a name="line.1365"></a>
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<span class="sourceLineNo">1371</span><a name="line.1371"></a>
<span class="sourceLineNo">1372</span> result.setErrors(data.getErrors());<a name="line.1372"></a>
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<span class="sourceLineNo">1375</span><a name="line.1375"></a>
<span class="sourceLineNo">1376</span> /**<a name="line.1376"></a>
<span class="sourceLineNo">1377</span> * Create a compound dataset from given datasets<a name="line.1377"></a>
<span class="sourceLineNo">1378</span> * @param datasets<a name="line.1378"></a>
<span class="sourceLineNo">1379</span> * @return compound dataset or null if none given<a name="line.1379"></a>
<span class="sourceLineNo">1380</span> */<a name="line.1380"></a>
<span class="sourceLineNo">1381</span> public static CompoundDataset createCompoundDataset(final Dataset... datasets) {<a name="line.1381"></a>
<span class="sourceLineNo">1382</span> if (datasets == null || datasets.length == 0)<a name="line.1382"></a>
<span class="sourceLineNo">1383</span> return null;<a name="line.1383"></a>
<span class="sourceLineNo">1384</span><a name="line.1384"></a>
<span class="sourceLineNo">1385</span> return createCompoundDataset(datasets[0].getDType(), datasets);<a name="line.1385"></a>
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<span class="sourceLineNo">1387</span><a name="line.1387"></a>
<span class="sourceLineNo">1388</span> /**<a name="line.1388"></a>
<span class="sourceLineNo">1389</span> * Create a compound dataset from given datasets<a name="line.1389"></a>
<span class="sourceLineNo">1390</span> * @param clazz dataset class<a name="line.1390"></a>
<span class="sourceLineNo">1391</span> * @param datasets<a name="line.1391"></a>
<span class="sourceLineNo">1392</span> * @return compound dataset or null if none given<a name="line.1392"></a>
<span class="sourceLineNo">1393</span> */<a name="line.1393"></a>
<span class="sourceLineNo">1394</span> public static &lt;T extends CompoundDataset&gt; T createCompoundDataset(Class&lt;T&gt; clazz, final Dataset... datasets) {<a name="line.1394"></a>
<span class="sourceLineNo">1395</span> return (T) createCompoundDataset(DTypeUtils.getDType(clazz), datasets);<a name="line.1395"></a>
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<span class="sourceLineNo">1397</span><a name="line.1397"></a>
<span class="sourceLineNo">1398</span> /**<a name="line.1398"></a>
<span class="sourceLineNo">1399</span> * Create a compound dataset from given datasets<a name="line.1399"></a>
<span class="sourceLineNo">1400&