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<li>Summary:&nbsp;</li>
<li><a href="#nested.classes.inherited.from.class.org.apache.sysds.runtime.compress.colgroup.ColGroup">Nested</a>&nbsp;|&nbsp;</li>
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<div class="subTitle">org.apache.sysds.runtime.compress.colgroup</div>
<h2 title="Class ColGroupDDC" class="title">Class ColGroupDDC</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<ul class="inheritance">
<li><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">org.apache.sysds.runtime.compress.colgroup.ColGroup</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">org.apache.sysds.runtime.compress.colgroup.ColGroupValue</a></li>
<li>
<ul class="inheritance">
<li>org.apache.sysds.runtime.compress.colgroup.ColGroupDDC</li>
</ul>
</li>
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</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupDDC1</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC2.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupDDC2</a></dd>
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<pre>public abstract class <span class="typeNameLabel">ColGroupDDC</span>
extends <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></pre>
<div class="block">Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC).
NOTE: zero values are included at position 0 in the value dictionary, which simplifies various operations such as
counting the number of non-zeros.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.sysds.runtime.compress.colgroup.ColGroupDDC">Serialized Form</a></dd>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupRowIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupRowIterator</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.CompressionType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.CompressionType</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#Z:Z_dict">_dict</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_colIndexes">_colIndexes</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_numRows">_numRows</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#Z:Z_zeros">_zeros</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#LOG">LOG</a></code></li>
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<h3>Constructor Summary</h3>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#ColGroupDDC--">ColGroupDDC</a></span>()</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#ColGroupDDC-int:A-int-double:A-">ColGroupDDC</a></span>(int[]&nbsp;colIndices,
int&nbsp;numRows,
double[]&nbsp;values)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#ColGroupDDC-int:A-int-org.apache.sysds.runtime.compress.UncompressedBitmap-">ColGroupDDC</a></span>(int[]&nbsp;colIndices,
int&nbsp;numRows,
<a href="../../../../../../org/apache/sysds/runtime/compress/UncompressedBitmap.html" title="class in org.apache.sysds.runtime.compress">UncompressedBitmap</a>&nbsp;ubm)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#computeColSums-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.KahanFunction-">computeColSums</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/KahanFunction.html" title="class in org.apache.sysds.runtime.functionobjects">KahanFunction</a>&nbsp;kplus)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#computeRowMxx-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.Builtin-int-int-">computeRowMxx</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/Builtin.html" title="class in org.apache.sysds.runtime.functionobjects">Builtin</a>&nbsp;builtin,
int&nbsp;rl,
int&nbsp;ru)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#computeRowSums-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.KahanFunction-int-int-">computeRowSums</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/KahanFunction.html" title="class in org.apache.sysds.runtime.functionobjects">KahanFunction</a>&nbsp;kplus,
int&nbsp;rl,
int&nbsp;ru)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#computeSum-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.KahanFunction-">computeSum</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/KahanFunction.html" title="class in org.apache.sysds.runtime.functionobjects">KahanFunction</a>&nbsp;kplus)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#countNonZerosPerRow-int:A-int-int-">countNonZerosPerRow</a></span>(int[]&nbsp;rnnz,
int&nbsp;rl,
int&nbsp;ru)</code>
<div class="block">Count the number of non-zeros per row</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;colpos)</code>
<div class="block">Decompress to block.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int[]&nbsp;colIndexTargets)</code>
<div class="block">Decompress the contents of this column group into uncompressed packed columns</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">decompressToBlock</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;rl,
int&nbsp;ru)</code>
<div class="block">Decompress the contents of this column group into the specified full matrix block.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#estimateInMemorySize--">estimateInMemorySize</a></span>()</code>
<div class="block">Note: Must be overridden by child classes to account for additional data and metadata</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#get-int-int-">get</a></span>(int&nbsp;r,
int&nbsp;c)</code>
<div class="block">Get the value at a global row/column position.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>protected abstract int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getCode-int-">getCode</a></span>(int&nbsp;r)</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.CompressionType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.CompressionType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getCompType--">getCompType</a></span>()</code>
<div class="block">Obtain the compression type.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>protected abstract double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getData-int-">getData</a></span>(int&nbsp;r)</code>
<div class="block">Generic get value for byte-length-agnostic access to first column.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected abstract double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getData-int-int-">getData</a></span>(int&nbsp;r,
int&nbsp;colIx)</code>
<div class="block">Generic get value for byte-length-agnostic access.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../org/apache/sysds/runtime/matrix/data/IJV.html" title="class in org.apache.sysds.runtime.matrix.data">IJV</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getIterator-int-int-boolean-boolean-">getIterator</a></span>(int&nbsp;rl,
int&nbsp;ru,
boolean&nbsp;inclZeros,
boolean&nbsp;rowMajor)</code>
<div class="block">Create a column group iterator for a row index range.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupRowIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupRowIterator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getRowIterator-int-int-">getRowIterator</a></span>(int&nbsp;rl,
int&nbsp;ru)</code>
<div class="block">Create a dense row iterator for a row index range.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#postScaling-double:A-double:A-">postScaling</a></span>(double[]&nbsp;vals,
double[]&nbsp;c)</code>&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>protected abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#setData-int-int-">setData</a></span>(int&nbsp;r,
int&nbsp;code)</code>
<div class="block">Generic set value for byte-length-agnostic write of encoded value.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#toString--">toString</a></span>()</code>&nbsp;</td>
</tr>
</table>
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<li class="blockList"><a name="methods.inherited.from.class.org.apache.sysds.runtime.compress.colgroup.ColGroupValue">
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<h3>Methods inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#allocDVector-int-boolean-">allocDVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#allocIVector-int-boolean-">allocIVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#applyScalarOp-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">applyScalarOp</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#applyScalarOp-org.apache.sysds.runtime.matrix.operators.ScalarOperator-double-int-">applyScalarOp</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#cleanupThreadLocalMemory--">cleanupThreadLocalMemory</a>, <a 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<h3>Methods inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColGroupType--">getColGroupType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColIndex-int-">getColIndex</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getColIndices--">getColIndices</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getExactSizeOnDisk--">getExactSizeOnDisk</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getNumCols--">getNumCols</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getNumRows--">getNumRows</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#leftMultByRowVector-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">leftMultByRowVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-">readFields</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-boolean-">readFields</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByVector-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">rightMultByVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#scalarOperation-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">scalarOperation</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#shiftColIndices-int-">shiftColIndices</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-">write</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-boolean-">write</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/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/8/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/8/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/8/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/8/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/8/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/8/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/8/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/8/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/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Constructor Detail</h3>
<a name="ColGroupDDC--">
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<h4>ColGroupDDC</h4>
<pre>public&nbsp;ColGroupDDC()</pre>
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<h4>ColGroupDDC</h4>
<pre>protected&nbsp;ColGroupDDC(int[]&nbsp;colIndices,
int&nbsp;numRows,
<a href="../../../../../../org/apache/sysds/runtime/compress/UncompressedBitmap.html" title="class in org.apache.sysds.runtime.compress">UncompressedBitmap</a>&nbsp;ubm)</pre>
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<pre>protected&nbsp;ColGroupDDC(int[]&nbsp;colIndices,
int&nbsp;numRows,
double[]&nbsp;values)</pre>
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<h4>getCompType</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.CompressionType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.CompressionType</a>&nbsp;getCompType()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getCompType--">ColGroup</a></code></span></div>
<div class="block">Obtain the compression type.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getCompType--">getCompType</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>How the elements of the column group are compressed.</dd>
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<h4>decompressToBlock</h4>
<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;rl,
int&nbsp;ru)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">ColGroup</a></code></span></div>
<div class="block">Decompress the contents of this column group into the specified full matrix block.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - a matrix block where the columns covered by this column group have not yet been filled in.</dd>
<dd><code>rl</code> - row lower</dd>
<dd><code>ru</code> - row upper</dd>
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<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int[]&nbsp;colIndexTargets)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">ColGroup</a></code></span></div>
<div class="block">Decompress the contents of this column group into uncompressed packed columns</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - a dense matrix block. The block must have enough space to hold the contents of this column
group.</dd>
<dd><code>colIndexTargets</code> - array that maps column indices in the original matrix block to columns of target.</dd>
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<h4>decompressToBlock</h4>
<pre>public&nbsp;void&nbsp;decompressToBlock(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;target,
int&nbsp;colpos)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">ColGroup</a></code></span></div>
<div class="block">Decompress to block.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">decompressToBlock</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>target</code> - dense output vector</dd>
<dd><code>colpos</code> - column to decompress, error if larger or equal numCols</dd>
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<h4>get</h4>
<pre>public&nbsp;double&nbsp;get(int&nbsp;r,
int&nbsp;c)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#get-int-int-">ColGroup</a></code></span></div>
<div class="block">Get the value at a global row/column position.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#get-int-int-">get</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - row</dd>
<dd><code>c</code> - column</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>value at the row/column position</dd>
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<pre>public&nbsp;void&nbsp;countNonZerosPerRow(int[]&nbsp;rnnz,
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int&nbsp;ru)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#countNonZerosPerRow-int:A-int-int-">ColGroup</a></code></span></div>
<div class="block">Count the number of non-zeros per row</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#countNonZerosPerRow-int:A-int-int-">countNonZerosPerRow</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rnnz</code> - non-zeros per row</dd>
<dd><code>rl</code> - row lower bound, inclusive</dd>
<dd><code>ru</code> - row upper bound, exclusive</dd>
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<pre>protected&nbsp;void&nbsp;computeSum(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
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<pre>protected&nbsp;void&nbsp;computeColSums(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
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<pre>protected&nbsp;void&nbsp;computeRowSums(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/KahanFunction.html" title="class in org.apache.sysds.runtime.functionobjects">KahanFunction</a>&nbsp;kplus,
int&nbsp;rl,
int&nbsp;ru)</pre>
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<pre>protected&nbsp;void&nbsp;computeRowMxx(<a href="../../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;result,
<a href="../../../../../../org/apache/sysds/runtime/functionobjects/Builtin.html" title="class in org.apache.sysds.runtime.functionobjects">Builtin</a>&nbsp;builtin,
int&nbsp;rl,
int&nbsp;ru)</pre>
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<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#computeRowMxx-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.functionobjects.Builtin-int-int-">computeRowMxx</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></code></dd>
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<h4>postScaling</h4>
<pre>protected final&nbsp;void&nbsp;postScaling(double[]&nbsp;vals,
double[]&nbsp;c)</pre>
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<h4>getData</h4>
<pre>protected abstract&nbsp;double&nbsp;getData(int&nbsp;r)</pre>
<div class="block">Generic get value for byte-length-agnostic access to first column.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - global row index</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>value</dd>
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<h4>getData</h4>
<pre>protected abstract&nbsp;double&nbsp;getData(int&nbsp;r,
int&nbsp;colIx)</pre>
<div class="block">Generic get value for byte-length-agnostic access.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - global row index</dd>
<dd><code>colIx</code> - local column index</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>value</dd>
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<a name="setData-int-int-">
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<h4>setData</h4>
<pre>protected abstract&nbsp;void&nbsp;setData(int&nbsp;r,
int&nbsp;code)</pre>
<div class="block">Generic set value for byte-length-agnostic write of encoded value.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>r</code> - global row index</dd>
<dd><code>code</code> - encoded value</dd>
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<h4>getCode</h4>
<pre>protected abstract&nbsp;int&nbsp;getCode(int&nbsp;r)</pre>
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<h4>estimateInMemorySize</h4>
<pre>public&nbsp;long&nbsp;estimateInMemorySize()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#estimateInMemorySize--">ColGroup</a></code></span></div>
<div class="block">Note: Must be overridden by child classes to account for additional data and metadata</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#estimateInMemorySize--">estimateInMemorySize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an upper bound on the number of bytes used to store this ColGroup in memory.</dd>
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<h4>getIterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../org/apache/sysds/runtime/matrix/data/IJV.html" title="class in org.apache.sysds.runtime.matrix.data">IJV</a>&gt;&nbsp;getIterator(int&nbsp;rl,
int&nbsp;ru,
boolean&nbsp;inclZeros,
boolean&nbsp;rowMajor)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getIterator-int-int-boolean-boolean-">ColGroup</a></code></span></div>
<div class="block">Create a column group iterator for a row index range.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getIterator-int-int-boolean-boolean-">getIterator</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rl</code> - row lower index, inclusive</dd>
<dd><code>ru</code> - row upper index, exclusive</dd>
<dd><code>inclZeros</code> - include zero values into scope of iterator</dd>
<dd><code>rowMajor</code> - use a row major iteration order</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterator instance</dd>
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<h4>getRowIterator</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.ColGroupRowIterator.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup.ColGroupRowIterator</a>&nbsp;getRowIterator(int&nbsp;rl,
int&nbsp;ru)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getRowIterator-int-int-">ColGroup</a></code></span></div>
<div class="block">Create a dense row iterator for a row index range. This iterator implies the inclusion of zeros and row-major
iteration order.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getRowIterator-int-int-">getRowIterator</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rl</code> - row lower index, inclusive</dd>
<dd><code>ru</code> - row upper index, exclusive</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an iterator instance</dd>
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<h4>toString</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#toString--">toString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupValue</a></code></dd>
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