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 <div class="subTitle">org.apache.sysds.runtime.compress</div>
 <h2 title="Class CompressedMatrixBlock" class="title">Class CompressedMatrixBlock</h2>
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 <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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 <li><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixValue.html" title="class in org.apache.sysds.runtime.matrix.data">org.apache.sysds.runtime.matrix.data.MatrixValue</a></li>
 <li>
 <ul class="inheritance">
 <li><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">org.apache.sysds.runtime.matrix.data.MatrixBlock</a></li>
 <li>
 <ul class="inheritance">
 <li><a href="../../../../../org/apache/sysds/runtime/compress/AbstractCompressedMatrixBlock.html" title="class in org.apache.sysds.runtime.compress">org.apache.sysds.runtime.compress.AbstractCompressedMatrixBlock</a></li>
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 <li>org.apache.sysds.runtime.compress.CompressedMatrixBlock</li>
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 <pre>public class <span class="typeNameLabel">CompressedMatrixBlock</span>
 extends <a href="../../../../../org/apache/sysds/runtime/compress/AbstractCompressedMatrixBlock.html" title="class in org.apache.sysds.runtime.compress">AbstractCompressedMatrixBlock</a></pre>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../serialized-form.html#org.apache.sysds.runtime.compress.CompressedMatrixBlock">Serialized Form</a></dd>
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 <h3>Nested classes/interfaces inherited from class&nbsp;org.apache.sysds.runtime.matrix.data.<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></h3>
 <code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.SparsityEstimate.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock.SparsityEstimate</a></code></li>
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 <h3>Nested classes/interfaces inherited from class&nbsp;org.apache.sysds.runtime.matrix.data.<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixValue.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixValue</a></h3>
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 <code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#CONVERT_MCSR_TO_CSR_ON_DEEP_SERIALIZE">CONVERT_MCSR_TO_CSR_ON_DEEP_SERIALIZE</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#DEFAULT_INPLACE_SPARSEBLOCK">DEFAULT_INPLACE_SPARSEBLOCK</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#DEFAULT_SPARSEBLOCK">DEFAULT_SPARSEBLOCK</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#HEADER_SIZE">HEADER_SIZE</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#MAX_SHALLOW_SERIALIZE_OVERHEAD">MAX_SHALLOW_SERIALIZE_OVERHEAD</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#SPARSITY_TURN_POINT">SPARSITY_TURN_POINT</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#ULTRA_SPARSE_BLOCK_NNZ">ULTRA_SPARSE_BLOCK_NNZ</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#ULTRA_SPARSITY_TURN_POINT">ULTRA_SPARSITY_TURN_POINT</a>, <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html#ULTRA_SPARSITY_TURN_POINT2">ULTRA_SPARSITY_TURN_POINT2</a></code></li>
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 <th class="colOne" scope="col">Constructor and Description</th>
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 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#CompressedMatrixBlock--">CompressedMatrixBlock</a></span>()</code>
 <div class="block">Constructor for building an empty Compressed Matrix block object.</div>
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 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#CompressedMatrixBlock-int-int-boolean-">CompressedMatrixBlock</a></span>(int&nbsp;rl,
                      int&nbsp;cl,
                      boolean&nbsp;sparse)</code>
 <div class="block">Main constructor for building a block from scratch.</div>
 </td>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#CompressedMatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">CompressedMatrixBlock</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;that)</code>
 <div class="block">"Copy" constructor to populate this compressed block with the uncompressed contents of a conventional block.</div>
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 <h3>Method Summary</h3>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#aggregateBinaryOperations-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.operators.AggregateBinaryOperator-">aggregateBinaryOperations</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;m1,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;m2,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;ret,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/operators/AggregateBinaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">AggregateBinaryOperator</a>&nbsp;op)</code>&nbsp;</td>
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 <tr id="i1" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#aggregateUnaryOperations-org.apache.sysds.runtime.matrix.operators.AggregateUnaryOperator-org.apache.sysds.runtime.matrix.data.MatrixValue-int-org.apache.sysds.runtime.matrix.data.MatrixIndexes-">aggregateUnaryOperations</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/operators/AggregateUnaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">AggregateUnaryOperator</a>&nbsp;op,
                         <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixValue.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixValue</a>&nbsp;result,
                         int&nbsp;blen,
                         <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixIndexes.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixIndexes</a>&nbsp;indexesIn)</code>&nbsp;</td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#aggregateUnaryOperations-org.apache.sysds.runtime.matrix.operators.AggregateUnaryOperator-org.apache.sysds.runtime.matrix.data.MatrixValue-int-org.apache.sysds.runtime.matrix.data.MatrixIndexes-boolean-">aggregateUnaryOperations</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/operators/AggregateUnaryOperator.html" title="class in org.apache.sysds.runtime.matrix.operators">AggregateUnaryOperator</a>&nbsp;op,
                         <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixValue.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixValue</a>&nbsp;result,
                         int&nbsp;blen,
                         <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixIndexes.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixIndexes</a>&nbsp;indexesIn,
                         boolean&nbsp;inCP)</code>&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#allocateColGroupList-java.util.List-">allocateColGroupList</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a>&gt;&nbsp;colGroups)</code>&nbsp;</td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#append-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">append</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;that,
       <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;ret)</code>&nbsp;</td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>static long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#baseSizeInMemory--">baseSizeInMemory</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#chainMatrixMultOperations-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.lops.MapMultChain.ChainType-">chainMatrixMultOperations</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;v,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;w,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
                          <a href="../../../../../org/apache/sysds/lops/MapMultChain.ChainType.html" title="enum in org.apache.sysds.lops">MapMultChain.ChainType</a>&nbsp;ctype)</code>&nbsp;</td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#chainMatrixMultOperations-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.lops.MapMultChain.ChainType-int-">chainMatrixMultOperations</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;v,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;w,
                          <a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;out,
                          <a href="../../../../../org/apache/sysds/lops/MapMultChain.ChainType.html" title="enum in org.apache.sysds.lops">MapMultChain.ChainType</a>&nbsp;ctype,
                          int&nbsp;k)</code>&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>int[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#countNonZerosPerRow-int-int-">countNonZerosPerRow</a></span>(int&nbsp;rl,
                    int&nbsp;ru)</code>&nbsp;</td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#decompress--">decompress</a></span>()</code>
 <div class="block">Decompress block.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#decompress-int-">decompress</a></span>(int&nbsp;k)</code>
 <div class="block">Decompress block.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#estimateCompressedSizeInMemory--">estimateCompressedSizeInMemory</a></span>()</code>
 <div class="block">Obtain an upper bound on the memory used to store the compressed block.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/sysds/runtime/compress/colgroup/ColGroup.html" title="class in org.apache.sysds.runtime.compress.colgroup">ColGroup</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#getColGroups--">getColGroups</a></span>()</code>&nbsp;</td>
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 <tr id="i13" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/compress/CompressionStatistics.html" title="class in org.apache.sysds.runtime.compress">CompressionStatistics</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#getCompressionStatistics--">getCompressionStatistics</a></span>()</code>&nbsp;</td>
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 <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;double[]&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#getDenseRowIterator-int-int-">getDenseRowIterator</a></span>(int&nbsp;rl,
                    int&nbsp;ru)</code>&nbsp;</td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/runtime/compress/CompressedMatrixBlock.html#getExactSizeOnDisk--">getExactSizeOnDisk</a></span>()</code>
 <div class="block">NOTE: The used estimates must be kept consistent with the respective write functions.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
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 <td class="colFirst"><code>void</code></td>
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 <div class="block">Redirects the default java serialization via externalizable to our default hadoop writable serialization for
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