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<div class="subTitle">org.eclipse.january.dataset</div>
<h2 title="Class DatasetUtils" class="title">Class DatasetUtils</h2>
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<li>org.eclipse.january.dataset.DatasetUtils</li>
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<pre>public class <a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.30">DatasetUtils</a>
extends <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Utilities for manipulating datasets</div>
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<h3>Field Summary</h3>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static org.slf4j.Logger</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#utilsLogger">utilsLogger</a></strong></code>
<div class="block">Setup the logging facilities</div>
</td>
</tr>
</table>
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<td class="colOne"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#DatasetUtils()">DatasetUtils</a></strong>()</code>&nbsp;</td>
</tr>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#append(org.eclipse.january.dataset.IDataset,%20org.eclipse.january.dataset.IDataset,%20int)">append</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;b,
int&nbsp;axis)</code>
<div class="block">Append copy of dataset with another dataset along n-th axis</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#calcIndexesFromPositions(java.util.List,%20int[],%20int...)">calcIndexesFromPositions</a></strong>(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;? extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;positions,
int[]&nbsp;shape,
int...&nbsp;mode)</code>
<div class="block">Calculate indexes in given shape from datasets of position</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#calcPositionsFromIndexes(org.eclipse.january.dataset.Dataset,%20int[])">calcPositionsFromIndexes</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
int[]&nbsp;shape)</code>
<div class="block">Calculate positions in given shape from a dataset of 1-D indexes</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#cast(java.lang.Class,%20org.eclipse.january.dataset.IDataset)">cast</a></strong>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d)</code>
<div class="block">Cast a dataset</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#cast(org.eclipse.january.dataset.Dataset[],%20int)">cast</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>[]&nbsp;a,
int&nbsp;dtype)</code>
<div class="block">Cast array of datasets to a compound dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#cast(org.eclipse.january.dataset.IDataset,%20boolean,%20int,%20int)">cast</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
boolean&nbsp;repeat,
int&nbsp;dtype,
int&nbsp;isize)</code>
<div class="block">Cast a dataset</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#cast(org.eclipse.january.dataset.IDataset,%20int)">cast</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
int&nbsp;dtype)</code>
<div class="block">Cast a dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static double[]</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#centroid(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset...)">centroid</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;bases)</code>
<div class="block">Get the centroid value of a dataset, this function works out the centroid in every direction</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#choose(org.eclipse.january.dataset.IntegerDataset,%20java.lang.Object[],%20boolean,%20boolean)">choose</a></strong>(<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;index,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]&nbsp;choices,
boolean&nbsp;throwAIOOBE,
boolean&nbsp;clip)</code>
<div class="block">Choose content from choices where condition is true, otherwise use default.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#coerce(org.eclipse.january.dataset.Dataset,%20java.lang.Object)">coerce</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;obj)</code>
<div class="block">Create a copy that has been coerced to an appropriate dataset type
depending on the input object's class</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#concatenate(org.eclipse.january.dataset.IDataset[],%20int)">concatenate</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>[]&nbsp;as,
int&nbsp;axis)</code>
<div class="block">Concatenate the set of datasets along given axis</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#convertToDataset(org.eclipse.january.dataset.IDataset)">convertToDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data)</code>
<div class="block">Convert (if necessary) a dataset obeying the interface to our implementation</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#copy(java.lang.Class,%20org.eclipse.january.dataset.IDataset)">copy</a></strong>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d)</code>
<div class="block">Copy and cast a dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#copy(org.eclipse.january.dataset.IDataset,%20int)">copy</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
int&nbsp;dtype)</code>
<div class="block">Copy and cast a dataset</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createCompoundDataset(java.lang.Class,%20org.eclipse.january.dataset.Dataset...)">createCompoundDataset</a></strong>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</code>
<div class="block">Create a compound dataset from given datasets</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createCompoundDataset(org.eclipse.january.dataset.Dataset...)">createCompoundDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</code>
<div class="block">Create a compound dataset from given datasets</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createCompoundDataset(org.eclipse.january.dataset.Dataset,%20int)">createCompoundDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;dataset,
int&nbsp;itemSize)</code>
<div class="block">Create a compound dataset from given dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createCompoundDataset(int,%20org.eclipse.january.dataset.Dataset...)">createCompoundDataset</a></strong>(int&nbsp;dtype,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</code>
<div class="block">Create a compound dataset from given datasets</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createCompoundDatasetFromLastAxis(org.eclipse.january.dataset.Dataset,%20boolean)">createCompoundDatasetFromLastAxis</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
boolean&nbsp;shareData)</code>
<div class="block">Create a compound dataset by using last axis as elements of an item</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createDatasetFromCompoundDataset(org.eclipse.january.dataset.CompoundDataset,%20boolean)">createDatasetFromCompoundDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;a,
boolean&nbsp;shareData)</code>
<div class="block">Create a dataset from a compound dataset by using elements of an item as last axis</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#createJavaArray(org.eclipse.january.dataset.Dataset)">createJavaArray</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</code>
<div class="block">Create Java array (of arrays) from dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#crossings(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset,%20double)">crossings</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;xAxis,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;yAxis,
double&nbsp;yValue)</code>
<div class="block">Find x values of all the crossing points of the dataset with the given y value</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#crossings(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset,%20double,%20double)">crossings</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;xAxis,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;yAxis,
double&nbsp;yValue,
double&nbsp;xRangeProportion)</code>
<div class="block">Function that uses the crossings function but prunes the result, so that multiple crossings within a
certain proportion of the overall range of the x values</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#crossings(org.eclipse.january.dataset.Dataset,%20double)">crossings</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;d,
double&nbsp;value)</code>
<div class="block">Find linearly-interpolated crossing points where the given dataset crosses the given value</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#diag(T,%20int)">diag</a></strong>(T&nbsp;a,
int&nbsp;offset)</code>
<div class="block">Create a (off-)diagonal matrix from items in dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#extract(org.eclipse.january.dataset.IDataset,%20org.eclipse.january.dataset.IDataset)">extract</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;condition)</code>
<div class="block">Extract values where condition is non-zero.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#eye(int,%20int,%20int,%20int)">eye</a></strong>(int&nbsp;rows,
int&nbsp;cols,
int&nbsp;offset,
int&nbsp;dtype)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findFirstOccurrences(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset)">findFirstOccurrences</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;values)</code>
<div class="block">Find first occurrences in one dataset of values given in another sorted dataset</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexEqualTo(org.eclipse.january.dataset.Dataset,%20double)">findIndexEqualTo</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</code>
<div class="block">Find absolute index of first value in dataset that is equal to given number</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexesForValues(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset)">findIndexesForValues</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;values)</code>
<div class="block">Find indexes in sorted dataset of values for each value in other dataset</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexGreaterThan(org.eclipse.january.dataset.Dataset,%20double)">findIndexGreaterThan</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</code>
<div class="block">Find absolute index of first value in dataset that is greater than given number</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexGreaterThanOrEqualTo(org.eclipse.january.dataset.Dataset,%20double)">findIndexGreaterThanOrEqualTo</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</code>
<div class="block">Find absolute index of first value in dataset that is greater than or equal to given number</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexLessThan(org.eclipse.january.dataset.Dataset,%20double)">findIndexLessThan</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</code>
<div class="block">Find absolute index of first value in dataset that is less than given number</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#findIndexLessThanOrEqualTo(org.eclipse.january.dataset.Dataset,%20double)">findIndexLessThanOrEqualTo</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</code>
<div class="block">Find absolute index of first value in dataset that is less than or equal to given number</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#flipLeftRight(T)">flipLeftRight</a></strong>(T&nbsp;a)</code>
<div class="block">Flip items in left/right direction, column-wise, or along second axis</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#flipUpDown(T)">flipUpDown</a></strong>(T&nbsp;a)</code>
<div class="block">Flip items in up/down direction, row-wise, or along first axis</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#indices(int...)">indices</a></strong>(int...&nbsp;shape)</code>
<div class="block">Generate an index dataset for given dataset where sub-datasets contain index values</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#lnnorm(org.eclipse.january.dataset.Dataset)">lnnorm</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</code>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1
and has been distributed on a natural log scale</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#lognorm(org.eclipse.january.dataset.Dataset)">lognorm</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</code>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1
and has been distributed on a log10 scale</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#makeFinite(org.eclipse.january.dataset.Dataset)">makeFinite</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</code>
<div class="block">Make floating point datasets contain only finite values.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#makeUnsigned(org.eclipse.january.dataset.IDataset)">makeUnsigned</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a)</code>
<div class="block">Make a dataset unsigned by promoting it to a wider dataset type and unwrapping the signs
of its content</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#meshGrid(org.eclipse.january.dataset.Dataset...)">meshGrid</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;axes)</code>
<div class="block">Construct a list of datasets where each represents a coordinate varying over the hypergrid
formed by the input list of axes</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#norm(org.eclipse.january.dataset.CompoundDataset,%20boolean)">norm</a></strong>(<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;a,
boolean&nbsp;overAllElements)</code>
<div class="block">Function that returns a normalised compound dataset which is bounded between 0 and 1.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#norm(org.eclipse.january.dataset.Dataset)">norm</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</code>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#put(T,%20org.eclipse.january.dataset.Dataset,%20java.lang.Object)">put</a></strong>(T&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;values)</code>
<div class="block">Changes specific items of dataset by replacing them with other array</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#put(T,%20int[],%20java.lang.Object)">put</a></strong>(T&nbsp;a,
int[]&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;values)</code>
<div class="block">Changes specific items of dataset by replacing them with other array</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#removeNansAndInfinities(org.eclipse.january.dataset.Dataset,%20java.lang.Number)">removeNansAndInfinities</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&nbsp;value)</code>
<div class="block">Removes NaNs and infinities from floating point datasets.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#repeat(T,%20int[],%20int)">repeat</a></strong>(T&nbsp;a,
int[]&nbsp;repeats,
int&nbsp;axis)</code>
<div class="block">Constructs a dataset which has its elements along an axis replicated from
the original dataset by the number of times given in the repeats array.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#resize(T,%20int...)">resize</a></strong>(T&nbsp;a,
int...&nbsp;shape)</code>
<div class="block">Resize a dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#roll(T,%20int,%20java.lang.Integer)">roll</a></strong>(T&nbsp;a,
int&nbsp;shift,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</code>
<div class="block">Roll items over given axis by given amount</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#rollAxis(T,%20int,%20int)">rollAxis</a></strong>(T&nbsp;a,
int&nbsp;axis,
int&nbsp;start)</code>
<div class="block">Roll the specified axis backwards until it lies in given position</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#rotate90(T)">rotate90</a></strong>(T&nbsp;a)</code>
<div class="block">Rotate items in first two dimension by 90 degrees anti-clockwise</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#rotate90(T,%20int)">rotate90</a></strong>(T&nbsp;a,
int&nbsp;k)</code>
<div class="block">Rotate items in first two dimension by 90 degrees anti-clockwise</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#select(org.eclipse.january.dataset.BooleanDataset[],%20java.lang.Object[],%20java.lang.Object)">select</a></strong>(<a href="../../../../org/eclipse/january/dataset/BooleanDataset.html" title="class in org.eclipse.january.dataset">BooleanDataset</a>[]&nbsp;conditions,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]&nbsp;choices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;def)</code>
<div class="block">Select content from choices where condition is true, otherwise use default.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#select(org.eclipse.january.dataset.BooleanDataset,%20java.lang.Object,%20java.lang.Object)">select</a></strong>(<a href="../../../../org/eclipse/january/dataset/BooleanDataset.html" title="class in org.eclipse.january.dataset">BooleanDataset</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;x,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;y)</code>
<div class="block">Select content according where condition is true.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#serializeDataset(org.eclipse.january.dataset.IDataset)">serializeDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data)</code>
<div class="block">Serialize dataset by flattening it.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#sliceAndConvertLazyDataset(org.eclipse.january.dataset.ILazyDataset)">sliceAndConvertLazyDataset</a></strong>(<a href="../../../../org/eclipse/january/dataset/ILazyDataset.html" title="interface in org.eclipse.january.dataset">ILazyDataset</a>&nbsp;lazy)</code>
<div class="block">Slice (or fully load), if necessary, a lazy dataset, otherwise take a slice view and
convert to our dataset implementation.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#sort(org.eclipse.january.dataset.Dataset,%20org.eclipse.january.dataset.Dataset...)">sort</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;b)</code>
<div class="block">Sort in place given dataset and reorder ancillary datasets too</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#sort(T)">sort</a></strong>(T&nbsp;a)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#sort(T,%20java.lang.Integer)">sort</a></strong>(T&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#split(org.eclipse.january.dataset.Dataset,%20int[],%20int)">split</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int[]&nbsp;indices,
int&nbsp;axis)</code>
<div class="block">Split a dataset into parts along given axis</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#split(org.eclipse.january.dataset.Dataset,%20int,%20int,%20boolean)">split</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int&nbsp;sections,
int&nbsp;axis,
boolean&nbsp;checkEqual)</code>
<div class="block">Split a dataset into equal sections along given axis</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#swapAxes(org.eclipse.january.dataset.IDataset,%20int,%20int)">swapAxes</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int&nbsp;axis1,
int&nbsp;axis2)</code>
<div class="block">Swap two axes in dataset</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#take(T,%20org.eclipse.january.dataset.Dataset,%20java.lang.Integer)">take</a></strong>(T&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</code>
<div class="block">Take items from dataset along an axis</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static &lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<br>T</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#take(T,%20int[],%20java.lang.Integer)">take</a></strong>(T&nbsp;a,
int[]&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</code>
<div class="block">Take items from dataset along an axis</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#tile(org.eclipse.january.dataset.IDataset,%20int...)">tile</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int...&nbsp;reps)</code>
<div class="block">Construct a dataset that contains the original dataset repeated the number
of times in each axis given by corresponding entries in the reps array</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#transpose(org.eclipse.january.dataset.IDataset,%20int...)">transpose</a></strong>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int...&nbsp;axes)</code>
<div class="block">Permute copy of dataset's axes so that given order is old order:</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../org/eclipse/january/dataset/DatasetUtils.html#unwrapUnsigned(org.eclipse.january.dataset.Dataset,%20int)">unwrapUnsigned</a></strong>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int&nbsp;bitWidth)</code>
<div class="block">Unwrap dataset elements so that all elements are unsigned</div>
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<code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
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<pre>protected static final transient&nbsp;org.slf4j.Logger <a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.35">utilsLogger</a></pre>
<div class="block">Setup the logging facilities</div>
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<pre>public&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.30">DatasetUtils</a>()</pre>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.46">append</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;b,
int&nbsp;axis)</pre>
<div class="block">Append copy of dataset with another dataset along n-th axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>b</code> - </dd><dd><code>axis</code> - number of axis (negative number counts from last)</dd>
<dt><span class="strong">Returns:</span></dt><dd>appended dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.99">put</a>(T&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;values)</pre>
<div class="block">Changes specific items of dataset by replacing them with other array</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>indices</code> - dataset interpreted as integers</dd><dd><code>values</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>changed dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.119">put</a>(T&nbsp;a,
int[]&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;values)</pre>
<div class="block">Changes specific items of dataset by replacing them with other array</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>indices</code> - </dd><dd><code>values</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>changed dataset</dd></dl>
</li>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.137">take</a>(T&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</pre>
<div class="block">Take items from dataset along an axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>indices</code> - dataset interpreted as integers</dd><dd><code>axis</code> - if null, then use flattened view</dd>
<dt><span class="strong">Returns:</span></dt><dd>a sub-array</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.149">take</a>(T&nbsp;a,
int[]&nbsp;indices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</pre>
<div class="block">Take items from dataset along an axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>indices</code> - </dd><dd><code>axis</code> - if null, then use flattened view</dd>
<dt><span class="strong">Returns:</span></dt><dd>a sub-array</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.203">tile</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int...&nbsp;reps)</pre>
<div class="block">Construct a dataset that contains the original dataset repeated the number
of times in each axis given by corresponding entries in the reps array</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>reps</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>tiled dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.306">transpose</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int...&nbsp;axes)</pre>
<div class="block">Permute copy of dataset's axes so that given order is old order:
<pre>
axisPerm = (p(0), p(1),...) => newdata(n(0), n(1),...) = olddata(o(0), o(1), ...)
such that n(i) = o(p(i)) for all i
</pre>
I.e. for a 3D dataset (1,0,2) implies the new dataset has its 1st dimension
running along the old dataset's 2nd dimension and the new 2nd is the old 1st.
The 3rd dimension is left unchanged.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>axes</code> - if null or zero length then axes order reversed</dd>
<dt><span class="strong">Returns:</span></dt><dd>remapped copy of data</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.317">swapAxes</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a,
int&nbsp;axis1,
int&nbsp;axis2)</pre>
<div class="block">Swap two axes in dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>axis1</code> - </dd><dd><code>axis2</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>swapped dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.325">sort</a>(T&nbsp;a)</pre>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>sorted flattened copy of dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.334">sort</a>(T&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</pre>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>axis</code> - to sort along</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset sorted along axis</dd></dl>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.344">sort</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;b)</pre>
<div class="block">Sort in place given dataset and reorder ancillary datasets too</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset to be sorted</dd><dd><code>b</code> - ancillary datasets</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.387">concatenate</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>[]&nbsp;as,
int&nbsp;axis)</pre>
<div class="block">Concatenate the set of datasets along given axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>as</code> - </dd><dd><code>axis</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>concatenated dataset</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.449">split</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int&nbsp;sections,
int&nbsp;axis,
boolean&nbsp;checkEqual)</pre>
<div class="block">Split a dataset into equal sections along given axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>sections</code> - </dd><dd><code>axis</code> - </dd><dd><code>checkEqual</code> - makes sure the division is into equal parts</dd>
<dt><span class="strong">Returns:</span></dt><dd>list of split datasets</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.476">split</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int[]&nbsp;indices,
int&nbsp;axis)</pre>
<div class="block">Split a dataset into parts along given axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>indices</code> - </dd><dd><code>axis</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>list of split datasets</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.540">repeat</a>(T&nbsp;a,
int[]&nbsp;repeats,
int&nbsp;axis)</pre>
<div class="block">Constructs a dataset which has its elements along an axis replicated from
the original dataset by the number of times given in the repeats array.
By default, axis=-1 implies using a flattened version of the input dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>repeats</code> - </dd><dd><code>axis</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.634">resize</a>(T&nbsp;a,
int...&nbsp;shape)</pre>
<div class="block">Resize a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>shape</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>new dataset with new shape and items that are truncated or repeated, as necessary</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.654">copy</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
int&nbsp;dtype)</pre>
<div class="block">Copy and cast a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>d</code> - The dataset to be copied</dd><dd><code>dtype</code> - dataset type</dd>
<dt><span class="strong">Returns:</span></dt><dd>copied dataset of given type</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.765">copy</a>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d)</pre>
<div class="block">Copy and cast a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>clazz</code> - dataset class</dd><dd><code>d</code> - The dataset to be copied</dd>
<dt><span class="strong">Returns:</span></dt><dd>copied dataset of given type</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.778">cast</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
int&nbsp;dtype)</pre>
<div class="block">Cast a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>d</code> - The dataset to be cast.</dd><dd><code>dtype</code> - dataset type</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset of given type (or same dataset if already of the right type)</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.795">cast</a>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d)</pre>
<div class="block">Cast a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>clazz</code> - dataset class</dd><dd><code>d</code> - The dataset to be cast.</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset of given type (or same dataset if already of the right type)</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.808">cast</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;d,
boolean&nbsp;repeat,
int&nbsp;dtype,
int&nbsp;isize)</pre>
<div class="block">Cast a dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>d</code> - The dataset to be cast.</dd><dd><code>repeat</code> - repeat elements over item</dd><dd><code>dtype</code> - dataset type</dd><dd><code>isize</code> - item size</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.891">cast</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>[]&nbsp;a,
int&nbsp;dtype)</pre>
<div class="block">Cast array of datasets to a compound dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - The datasets to be cast.</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.945">makeUnsigned</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;a)</pre>
<div class="block">Make a dataset unsigned by promoting it to a wider dataset type and unwrapping the signs
of its content</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>unsigned dataset or original if it is not an integer dataset</dd></dl>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.982">unwrapUnsigned</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
int&nbsp;bitWidth)</pre>
<div class="block">Unwrap dataset elements so that all elements are unsigned</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd><dd><code>bitWidth</code> - width of original primitive in bits</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1107">eye</a>(int&nbsp;rows,
int&nbsp;cols,
int&nbsp;offset,
int&nbsp;dtype)</pre>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>rows</code> - </dd><dd><code>cols</code> - </dd><dd><code>offset</code> - </dd><dd><code>dtype</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>a new 2d dataset of given shape and type, filled with ones on the (offset) diagonal</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1133">diag</a>(T&nbsp;a,
int&nbsp;offset)</pre>
<div class="block">Create a (off-)diagonal matrix from items in dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>offset</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>diagonal matrix</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1190">sliceAndConvertLazyDataset</a>(<a href="../../../../org/eclipse/january/dataset/ILazyDataset.html" title="interface in org.eclipse.january.dataset">ILazyDataset</a>&nbsp;lazy)
throws <a href="../../../../org/eclipse/january/DatasetException.html" title="class in org.eclipse.january">DatasetException</a></pre>
<div class="block">Slice (or fully load), if necessary, a lazy dataset, otherwise take a slice view and
convert to our dataset implementation. If a slice is necessary, this may cause resource
problems when used on large datasets and throw runtime exceptions</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>lazy</code> - can be null</dd>
<dt><span class="strong">Returns:</span></dt><dd>Converted dataset or null</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../org/eclipse/january/DatasetException.html" title="class in org.eclipse.january">DatasetException</a></code></dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1204">convertToDataset</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data)</pre>
<div class="block">Convert (if necessary) a dataset obeying the interface to our implementation</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>data</code> - can be null</dd>
<dt><span class="strong">Returns:</span></dt><dd>Converted dataset or null</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1277">createCompoundDataset</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</pre>
<div class="block">Create a compound dataset from given datasets</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>datasets</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>compound dataset or null if none given</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1290">createCompoundDataset</a>(int&nbsp;dtype,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</pre>
<div class="block">Create a compound dataset from given datasets</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dtype</code> - </dd><dd><code>datasets</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>compound dataset or null if none given</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1343">createCompoundDataset</a>(<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;T&gt;&nbsp;clazz,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;datasets)</pre>
<div class="block">Create a compound dataset from given datasets</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>clazz</code> - dataset class</dd><dd><code>datasets</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>compound dataset or null if none given</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1353">createCompoundDataset</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;dataset,
int&nbsp;itemSize)</pre>
<div class="block">Create a compound dataset from given dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dataset</code> - </dd><dd><code>itemSize</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>compound dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1402">createCompoundDatasetFromLastAxis</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
boolean&nbsp;shareData)</pre>
<div class="block">Create a compound dataset by using last axis as elements of an item</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>shareData</code> - if true, then share data</dd>
<dt><span class="strong">Returns:</span></dt><dd>compound dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1430">createDatasetFromCompoundDataset</a>(<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;a,
boolean&nbsp;shareData)</pre>
<div class="block">Create a dataset from a compound dataset by using elements of an item as last axis
<p>
In the case where the number of elements is one, the last axis is squeezed out.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>shareData</code> - if true, then share data</dd>
<dt><span class="strong">Returns:</span></dt><dd>non-compound dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1442">coerce</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;obj)</pre>
<div class="block">Create a copy that has been coerced to an appropriate dataset type
depending on the input object's class</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>obj</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>coerced copy of dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1454">norm</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</pre>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>normalised dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1471">norm</a>(<a href="../../../../org/eclipse/january/dataset/CompoundDataset.html" title="interface in org.eclipse.january.dataset">CompoundDataset</a>&nbsp;a,
boolean&nbsp;overAllElements)</pre>
<div class="block">Function that returns a normalised compound dataset which is bounded between 0 and 1. There
are (at least) two ways to normalise a compound dataset: per element - extrema for each element
in a compound item is used, i.e. many min/max pairs; over all elements - extrema for all elements
is used, i.e. one min/max pair.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd><dd><code>overAllElements</code> - if true, then normalise over all elements in each item</dd>
<dt><span class="strong">Returns:</span></dt><dd>normalised dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1502">lognorm</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</pre>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1
and has been distributed on a log10 scale</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>normalised dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1517">lnnorm</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</pre>
<div class="block">Function that returns a normalised dataset which is bounded between 0 and 1
and has been distributed on a natural log scale</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>normalised dataset</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1533">meshGrid</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;axes)</pre>
<div class="block">Construct a list of datasets where each represents a coordinate varying over the hypergrid
formed by the input list of axes</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>axes</code> - an array of 1D datasets representing axes</dd>
<dt><span class="strong">Returns:</span></dt><dd>a list of coordinate datasets</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1580">indices</a>(int...&nbsp;shape)</pre>
<div class="block">Generate an index dataset for given dataset where sub-datasets contain index values</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>an index dataset</dd></dl>
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<pre>public static&nbsp;double[]&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1625">centroid</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>...&nbsp;bases)</pre>
<div class="block">Get the centroid value of a dataset, this function works out the centroid in every direction</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - the dataset to be analysed</dd><dd><code>bases</code> - the optional array of base coordinates to use as weights.
This defaults to the mid-point of indices</dd>
<dt><span class="strong">Returns:</span></dt><dd>a double array containing the centroid for each dimension</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1675">crossings</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;d,
double&nbsp;value)</pre>
<div class="block">Find linearly-interpolated crossing points where the given dataset crosses the given value</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>d</code> - </dd><dd><code>value</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>list of interpolated indices</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1716">crossings</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;xAxis,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;yAxis,
double&nbsp;yValue)</pre>
<div class="block">Find x values of all the crossing points of the dataset with the given y value</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>xAxis</code> - Dataset of the X axis that needs to be looked at</dd><dd><code>yAxis</code> - Dataset of the Y axis that needs to be looked at</dd><dd><code>yValue</code> - The y value the X values are required for</dd>
<dt><span class="strong">Returns:</span></dt><dd>An list of doubles containing all the X coordinates of where the line crosses</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1741">crossings</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;xAxis,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;yAxis,
double&nbsp;yValue,
double&nbsp;xRangeProportion)</pre>
<div class="block">Function that uses the crossings function but prunes the result, so that multiple crossings within a
certain proportion of the overall range of the x values</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>xAxis</code> - Dataset of the X axis</dd><dd><code>yAxis</code> - Dataset of the Y axis</dd><dd><code>yValue</code> - The y value the x values are required for</dd><dd><code>xRangeProportion</code> - The proportion of the overall x spread used to prune result</dd>
<dt><span class="strong">Returns:</span></dt><dd>A list containing all the unique crossing points</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1795">createJavaArray</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</pre>
<div class="block">Create Java array (of arrays) from dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>Java array (of arrays...)</dd></dl>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1840">removeNansAndInfinities</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Number.html?is-external=true" title="class or interface in java.lang">Number</a>&nbsp;value)</pre>
<div class="block">Removes NaNs and infinities from floating point datasets.
All other dataset types are ignored.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd><dd><code>value</code> - replacement value</dd></dl>
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<pre>public static&nbsp;void&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1897">makeFinite</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a)</pre>
<div class="block">Make floating point datasets contain only finite values. Infinities and NaNs are replaced
by +/- MAX_VALUE and 0, respectively.
All other dataset types are ignored.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd></dl>
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double&nbsp;n)</pre>
<div class="block">Find absolute index of first value in dataset that is equal to given number</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>n</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute index (if greater than a.getSize() then no value found)</dd></dl>
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<pre>public static&nbsp;int&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1973">findIndexGreaterThan</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</pre>
<div class="block">Find absolute index of first value in dataset that is greater than given number</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>n</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute index (if greater than a.getSize() then no value found)</dd></dl>
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<pre>public static&nbsp;int&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.1989">findIndexGreaterThanOrEqualTo</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</pre>
<div class="block">Find absolute index of first value in dataset that is greater than or equal to given number</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>n</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute index (if greater than a.getSize() then no value found)</dd></dl>
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<pre>public static&nbsp;int&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2005">findIndexLessThan</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</pre>
<div class="block">Find absolute index of first value in dataset that is less than given number</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>n</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute index (if greater than a.getSize() then no value found)</dd></dl>
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<pre>public static&nbsp;int&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2021">findIndexLessThanOrEqualTo</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
double&nbsp;n)</pre>
<div class="block">Find absolute index of first value in dataset that is less than or equal to given number</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>n</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute index (if greater than a.getSize() then no value found)</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2037">findFirstOccurrences</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;values)</pre>
<div class="block">Find first occurrences in one dataset of values given in another sorted dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>values</code> - sorted 1D dataset of values to find</dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute indexes of those first occurrences (-1 is used to indicate value not found)</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2120">findIndexesForValues</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;a,
<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;values)</pre>
<div class="block">Find indexes in sorted dataset of values for each value in other dataset</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>values</code> - sorted 1D dataset of values to find</dd>
<dt><span class="strong">Returns:</span></dt><dd>absolute indexes of values (-1 is used to indicate value not found)</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2206">roll</a>(T&nbsp;a,
int&nbsp;shift,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&nbsp;axis)</pre>
<div class="block">Roll items over given axis by given amount</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>shift</code> - </dd><dd><code>axis</code> - if null, then roll flattened dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>rolled dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2255">rollAxis</a>(T&nbsp;a,
int&nbsp;axis,
int&nbsp;start)</pre>
<div class="block">Roll the specified axis backwards until it lies in given position</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - </dd><dd><code>axis</code> - The rolled axis (index in shape array). Other axes are left unchanged in relative positions</dd><dd><code>start</code> - The position with it right of the destination of the rolled axis</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset with rolled axis</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2299">flipLeftRight</a>(T&nbsp;a)</pre>
<div class="block">Flip items in left/right direction, column-wise, or along second axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset must be at least 2D</dd>
<dt><span class="strong">Returns:</span></dt><dd>view of flipped dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2311">flipUpDown</a>(T&nbsp;a)</pre>
<div class="block">Flip items in up/down direction, row-wise, or along first axis</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset</dd>
<dt><span class="strong">Returns:</span></dt><dd>view of flipped dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2320">rotate90</a>(T&nbsp;a)</pre>
<div class="block">Rotate items in first two dimension by 90 degrees anti-clockwise</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset must be at least 2D</dd>
<dt><span class="strong">Returns:</span></dt><dd>view of flipped dataset</dd></dl>
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<pre>public static&nbsp;&lt;T extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;T&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2330">rotate90</a>(T&nbsp;a,
int&nbsp;k)</pre>
<div class="block">Rotate items in first two dimension by 90 degrees anti-clockwise</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>a</code> - dataset must be at least 2D</dd><dd><code>k</code> - number of 90-degree rotations</dd>
<dt><span class="strong">Returns:</span></dt><dd>view of flipped dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2366">select</a>(<a href="../../../../org/eclipse/january/dataset/BooleanDataset.html" title="class in org.eclipse.january.dataset">BooleanDataset</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;x,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;y)</pre>
<div class="block">Select content according where condition is true. All inputs are broadcasted to a maximum shape</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>condition</code> - boolean dataset</dd><dd><code>x</code> - </dd><dd><code>y</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset where content is x or y depending on whether condition is true or otherwise</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2393">select</a>(<a href="../../../../org/eclipse/january/dataset/BooleanDataset.html" title="class in org.eclipse.january.dataset">BooleanDataset</a>[]&nbsp;conditions,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]&nbsp;choices,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;def)</pre>
<div class="block">Select content from choices where condition is true, otherwise use default. All inputs are broadcasted to a maximum shape</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>conditions</code> - array of boolean datasets</dd><dd><code>choices</code> - array of datasets or objects</dd><dd><code>def</code> - default value (can be a dataset)</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2450">choose</a>(<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;index,
<a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]&nbsp;choices,
boolean&nbsp;throwAIOOBE,
boolean&nbsp;clip)</pre>
<div class="block">Choose content from choices where condition is true, otherwise use default. All inputs are broadcasted to a maximum shape</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>index</code> - integer dataset (ideally, items should be in [0, n) range, if there are n choices)</dd><dd><code>choices</code> - array of datasets or objects</dd><dd><code>throwAIOOBE</code> - if true, throw array index out of bound exception</dd><dd><code>clip</code> - true to clip else wrap indices out of bounds; only used when throwAOOBE is false</dd>
<dt><span class="strong">Returns:</span></dt><dd>dataset</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&gt;&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2515">calcPositionsFromIndexes</a>(<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;indices,
int[]&nbsp;shape)</pre>
<div class="block">Calculate positions in given shape from a dataset of 1-D indexes</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>indices</code> - </dd><dd><code>shape</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>list of positions as integer datasets</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/IntegerDataset.html" title="class in org.eclipse.january.dataset">IntegerDataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2543">calcIndexesFromPositions</a>(<a href="https://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;? extends <a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&gt;&nbsp;positions,
int[]&nbsp;shape,
int...&nbsp;mode)</pre>
<div class="block">Calculate indexes in given shape from datasets of position</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>positions</code> - as a list of datasets where each holds the position in a dimension</dd><dd><code>shape</code> - </dd><dd><code>mode</code> - either null, zero-length, unit length or length of rank of shape where
0 = raise exception, 1 = wrap, 2 = clip</dd>
<dt><span class="strong">Returns:</span></dt><dd>indexes as an integer dataset</dd></dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2603">serializeDataset</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data)</pre>
<div class="block">Serialize dataset by flattening it. Discards metadata</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>data</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd>some java array</dd></dl>
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<pre>public static&nbsp;<a href="../../../../org/eclipse/january/dataset/Dataset.html" title="interface in org.eclipse.january.dataset">Dataset</a>&nbsp;<a href="../../../../src-html/org/eclipse/january/dataset/DatasetUtils.html#line.2616">extract</a>(<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;data,
<a href="../../../../org/eclipse/january/dataset/IDataset.html" title="interface in org.eclipse.january.dataset">IDataset</a>&nbsp;condition)</pre>
<div class="block">Extract values where condition is non-zero. This is similar to Dataset#getByBoolean but supports broadcasting</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>data</code> - </dd><dd><code>condition</code> - should be broadcastable to data</dd>
<dt><span class="strong">Returns:</span></dt><dd>1-D dataset of values</dd></dl>
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