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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 ColGroupDDC1" class="title">Class ColGroupDDC1</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>
<li>
<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><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html" title="class in org.apache.sysds.runtime.compress.colgroup">org.apache.sysds.runtime.compress.colgroup.ColGroupDDC</a></li>
<li>
<ul class="inheritance">
<li>org.apache.sysds.runtime.compress.colgroup.ColGroupDDC1</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a></dd>
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<pre>public class <span class="typeNameLabel">ColGroupDDC1</span>
extends <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupDDC</a></pre>
<div class="block">Class to encapsulate information about a column group that is encoded with dense dictionary encoding (DDC) using 1
byte codes.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.sysds.runtime.compress.colgroup.ColGroupDDC1">Serialized Form</a></dd>
</dl>
</li>
</ul>
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<h3>Nested Class Summary</h3>
<ul class="blockList">
<li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.sysds.runtime.compress.colgroup.ColGroup">
<!-- -->
</a>
<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.CompressionType.html" title="enum in org.apache.sysds.runtime.compress.colgroup">ColGroup.CompressionType</a></code></li>
</ul>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<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="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><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#binaryRowOp-org.apache.sysds.runtime.matrix.operators.BinaryOperator-double:A-boolean-">binaryRowOp</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/operators/BinaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">BinaryOperator</a>&nbsp;op,
double[]&nbsp;v,
boolean&nbsp;sparseSafe)</code>
<div class="block">Perform a binary row operation.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.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="i2" class="altColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#getData--">getData</a></span>()</code>
<div class="block">Getter method to get the data, contained in The DDC ColGroup.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#getExactSizeOnDisk--">getExactSizeOnDisk</a></span>()</code>
<div class="block">Returns the exact serialized size of column group.</div>
</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/ColGroupDDC1.html#readFields-java.io.DataInput-">readFields</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)</code>
<div class="block">Deserialize column group from data input.</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/ColGroupDDC1.html#recodeData-java.util.HashMap-">recodeData</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util">HashMap</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;map)</code>&nbsp;</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/ColGroupDDC1.html#rightMultByMatrix-double:A-double:A-int-int-int-int-int-">rightMultByMatrix</a></span>(double[]&nbsp;preAggregatedB,
double[]&nbsp;c,
int&nbsp;thatNrColumns,
int&nbsp;rl,
int&nbsp;ru,
int&nbsp;cl,
int&nbsp;cu)</code>
<div class="block">Right multiply by matrix.</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/ColGroupDDC1.html#rightMultBySparseMatrix-org.apache.sysds.runtime.data.SparseRow:A-double:A-int-double:A-int-int-int-">rightMultBySparseMatrix</a></span>(<a href="../../../../../../org/apache/sysds/runtime/data/SparseRow.html" title="class in org.apache.sysds.runtime.data">SparseRow</a>[]&nbsp;rows,
double[]&nbsp;c,
int&nbsp;numVals,
double[]&nbsp;dictVals,
int&nbsp;nrColumns,
int&nbsp;rl,
int&nbsp;ru)</code>
<div class="block">Sparse right multiply by matrix, for which the compressed matrix is on the left and the uncompressed sparse is on
the right.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#rightMultByVector-double:A-double:A-int-int-double:A-">rightMultByVector</a></span>(double[]&nbsp;b,
double[]&nbsp;c,
int&nbsp;rl,
int&nbsp;ru,
double[]&nbsp;dictVals)</code>
<div class="block">Multiply the slice of the matrix that this column group represents by a vector on the right.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#scalarOperation-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">scalarOperation</a></span>(<a href="../../../../../../org/apache/sysds/runtime/matrix/operators/ScalarOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">ScalarOperator</a>&nbsp;op)</code>
<div class="block">Perform the specified scalar operation directly on the compressed column group, without decompressing individual
cells if possible.</div>
</td>
</tr>
<tr id="i10" 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/ColGroupDDC1.html#toString--">toString</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC1.html#write-java.io.DataOutput-">write</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)</code>
<div class="block">Serializes column group to data output.</div>
</td>
</tr>
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<h3>Methods inherited from class&nbsp;org.apache.sysds.runtime.compress.colgroup.<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupDDC</a></h3>
<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#countNonZerosPerRow-int:A-int-int-">countNonZerosPerRow</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-">decompressToBlock</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int:A-">decompressToBlock</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-int-">decompressToBlock</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#get-int-int-">get</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getCompType--">getCompType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getCounts-int:A-">getCounts</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getCounts-int-int-int:A-">getCounts</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getIterator-int-int-boolean-boolean-">getIterator</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#getRowIterator-int-int-">getRowIterator</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#leftMultByMatrix-double:A-double:A-double:A-int-int-int-int-int-">leftMultByMatrix</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#leftMultByRowVector-double:A-double:A-int-">leftMultByRowVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#leftMultByRowVector-double:A-double:A-int-double:A-">leftMultByRowVector</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#leftMultBySparseMatrix-int-int:A-double:A-double:A-int-double:A-int-int-int-double:A-">leftMultBySparseMatrix</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#postScaling-double:A-double:A-double:A-int-">postScaling</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#postScaling-double:A-double:A-double:A-int-int-int-">postScaling</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#preAggregate-double:A-int-">preAggregate</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html#preAggregate-double:A-int-int-">preAggregate</a></code></li>
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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#cleanupThreadLocalMemory--">cleanupThreadLocalMemory</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#copy--">copy</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#copyAndSet-int:A-double:A-">copyAndSet</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getCounts--">getCounts</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getCounts-int-int-">getCounts</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getDictionary--">getDictionary</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getIfCountsType--">getIfCountsType</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getNumValues--">getNumValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getValues--">getValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getValuesAsBlock--">getValuesAsBlock</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#isLossy--">isLossy</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#preaggValues-int-double:A-double:A-int-int-int-">preaggValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#preaggValues-int-double:A-double:A-int-int-int-double:A-">preaggValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#preaggValues-int-org.apache.sysds.runtime.data.SparseBlock-double:A-int-int-int-">preaggValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#preaggValues-int-org.apache.sysds.runtime.data.SparseBlock-double:A-int-int-int-double:A-">preaggValues</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#setupThreadLocalMemory-int-">setupThreadLocalMemory</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#unaryAggregateOperations-org.apache.sysds.runtime.matrix.operators.AggregateUnaryOperator-double:A-">unaryAggregateOperations</a>, <a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#unaryAggregateOperations-org.apache.sysds.runtime.matrix.operators.AggregateUnaryOperator-double:A-int-int-">unaryAggregateOperations</a></code></li>
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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#decompressToBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-int-java.util.List-">decompressToBlock</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#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#shiftColIndices-int-">shiftColIndices</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><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#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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<h4>getData</h4>
<pre>public&nbsp;byte[]&nbsp;getData()</pre>
<div class="block">Getter method to get the data, contained in The DDC ColGroup.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The contained data</dd>
</dl>
</li>
</ul>
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<h4>rightMultByVector</h4>
<pre>public&nbsp;void&nbsp;rightMultByVector(double[]&nbsp;b,
double[]&nbsp;c,
int&nbsp;rl,
int&nbsp;ru,
double[]&nbsp;dictVals)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByVector-double:A-double:A-int-int-double:A-">ColGroup</a></code></span></div>
<div class="block">Multiply the slice of the matrix that this column group represents by a vector on the right.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByVector-double:A-double:A-int-int-double:A-">rightMultByVector</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>b</code> - Vector to multiply by (tall vector)</dd>
<dd><code>c</code> - Accumulator for holding the result</dd>
<dd><code>rl</code> - Row to start at</dd>
<dd><code>ru</code> - Row to stop at</dd>
<dd><code>dictVals</code> - The dictionary values materialized</dd>
</dl>
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<h4>rightMultByMatrix</h4>
<pre>public&nbsp;void&nbsp;rightMultByMatrix(double[]&nbsp;preAggregatedB,
double[]&nbsp;c,
int&nbsp;thatNrColumns,
int&nbsp;rl,
int&nbsp;ru,
int&nbsp;cl,
int&nbsp;cu)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByMatrix-double:A-double:A-int-int-int-int-int-">ColGroup</a></code></span></div>
<div class="block">Right multiply by matrix. for which the compressed matrix is on the left and the uncompressed is on the right.
Note that there is no b argument, but the b is aggregated into the values needed for assignment and addition into
output.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultByMatrix-double:A-double:A-int-int-int-int-int-">rightMultByMatrix</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>preAggregatedB</code> - The preAggregated values that is to be put into c</dd>
<dd><code>c</code> - The output matrix</dd>
<dd><code>thatNrColumns</code> - The number of columns in B (before aggregation)</dd>
<dd><code>rl</code> - The row index to start the multiplication from</dd>
<dd><code>ru</code> - The row index to stop the multiplication at</dd>
<dd><code>cl</code> - The column index to start from</dd>
<dd><code>cu</code> - The row index to stop at.</dd>
</dl>
</li>
</ul>
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<h4>rightMultBySparseMatrix</h4>
<pre>public&nbsp;void&nbsp;rightMultBySparseMatrix(<a href="../../../../../../org/apache/sysds/runtime/data/SparseRow.html" title="class in org.apache.sysds.runtime.data">SparseRow</a>[]&nbsp;rows,
double[]&nbsp;c,
int&nbsp;numVals,
double[]&nbsp;dictVals,
int&nbsp;nrColumns,
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#rightMultBySparseMatrix-org.apache.sysds.runtime.data.SparseRow:A-double:A-int-double:A-int-int-int-">ColGroup</a></code></span></div>
<div class="block">Sparse right multiply by matrix, for which the compressed matrix is on the left and the uncompressed sparse is on
the right. This call differ from the other right multiply by not having a preAggregation phase.
This should only be called in very sparse situations.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#rightMultBySparseMatrix-org.apache.sysds.runtime.data.SparseRow:A-double:A-int-double:A-int-int-int-">rightMultBySparseMatrix</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>rows</code> - The sparse rows</dd>
<dd><code>c</code> - The output matrix linearized</dd>
<dd><code>numVals</code> - The number of values in the dictionary</dd>
<dd><code>dictVals</code> - The materialized dictionary</dd>
<dd><code>nrColumns</code> - The number of columns in the matrix to multiply with and also in the output</dd>
<dd><code>rl</code> - The row index to start at</dd>
<dd><code>ru</code> - The row index to stop at.</dd>
</dl>
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<h4>recodeData</h4>
<pre>public&nbsp;void&nbsp;recodeData(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util">HashMap</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;map)</pre>
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<h4>write</h4>
<pre>public&nbsp;void&nbsp;write(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#write-java.io.DataOutput-">ColGroup</a></code></span></div>
<div class="block">Serializes column group to data output.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#write-java.io.DataOutput-">write</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="paramLabel">Parameters:</span></dt>
<dd><code>out</code> - data output</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if IOException occurs</dd>
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<h4>readFields</h4>
<pre>public&nbsp;void&nbsp;readFields(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#readFields-java.io.DataInput-">ColGroup</a></code></span></div>
<div class="block">Deserialize column group from data input.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#readFields-java.io.DataInput-">readFields</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="paramLabel">Parameters:</span></dt>
<dd><code>in</code> - data input</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if IOException occurs</dd>
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<h4>getExactSizeOnDisk</h4>
<pre>public&nbsp;long&nbsp;getExactSizeOnDisk()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#getExactSizeOnDisk--">ColGroup</a></code></span></div>
<div class="block">Returns the exact serialized size of column group. This can be used for example for buffer preallocation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupValue.html#getExactSizeOnDisk--">getExactSizeOnDisk</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>exact serialized size for column group</dd>
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<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">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#estimateInMemorySize--">estimateInMemorySize</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>an upper bound on the number of bytes used to store this ColGroup in memory.</dd>
</dl>
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<h4>scalarOperation</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a>&nbsp;scalarOperation(<a href="../../../../../../org/apache/sysds/runtime/matrix/operators/ScalarOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">ScalarOperator</a>&nbsp;op)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#scalarOperation-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">ColGroup</a></code></span></div>
<div class="block">Perform the specified scalar operation directly on the compressed column group, without decompressing individual
cells if possible.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#scalarOperation-org.apache.sysds.runtime.matrix.operators.ScalarOperator-">scalarOperation</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>op</code> - operation to perform</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>version of this column group with the operation applied</dd>
</dl>
</li>
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<h4>binaryRowOp</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a>&nbsp;binaryRowOp(<a href="../../../../../../org/apache/sysds/runtime/matrix/operators/BinaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">BinaryOperator</a>&nbsp;op,
double[]&nbsp;v,
boolean&nbsp;sparseSafe)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#binaryRowOp-org.apache.sysds.runtime.matrix.operators.BinaryOperator-double:A-boolean-">ColGroup</a></code></span></div>
<div class="block">Perform a binary row operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html#binaryRowOp-org.apache.sysds.runtime.matrix.operators.BinaryOperator-double:A-boolean-">binaryRowOp</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>op</code> - The operation to execute</dd>
<dd><code>v</code> - The vector of values to apply, should be same length as dictionary length.</dd>
<dd><code>sparseSafe</code> - True if the operation return 0 on all instances of values in v -- op(v[?], 0)</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A updated column group with the new values.</dd>
</dl>
</li>
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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/ColGroupDDC.html#toString--">toString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroupDDC.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroupDDC</a></code></dd>
</dl>
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