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<div class="subTitle">org.apache.sysds.hops.estim</div>
<h2 title="Class EstimatorSample" class="title">Class EstimatorSample</h2>
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<li><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">org.apache.sysds.hops.estim.SparsityEstimator</a></li>
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<pre>public class <span class="typeNameLabel">EstimatorSample</span>
extends <a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">SparsityEstimator</a></pre>
<div class="block">This estimator implements an approach based on row/column sampling
Yongyang Yu, MingJie Tang, Walid G. Aref, Qutaibah M. Malluhi, Mostafa M. Abbas, Mourad Ouzzani:
In-Memory Distributed Matrix Computation Processing and Optimization. ICDE 2017: 1047-1058
The basic idea is to draw random samples of aligned columns SA and rows SB,
and compute the output nnz as max(nnz(SA_i)*nnz(SB_i)). However, this estimator is
biased toward underestimation as the maximum is unlikely sampled and collisions are
not accounted for. Accordingly, we also support an extended estimator that relies
on similar ideas for element-wise addition as the other estimators.</div>
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<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.OpCode.html" title="enum in org.apache.sysds.hops.estim">SparsityEstimator.OpCode</a></code></li>
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<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#MIN_PAR_THRESHOLD">MIN_PAR_THRESHOLD</a>, <a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#MULTI_THREADED_BUILD">MULTI_THREADED_BUILD</a>, <a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#MULTI_THREADED_ESTIM">MULTI_THREADED_ESTIM</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#EstimatorSample--">EstimatorSample</a></span>()</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#EstimatorSample-double-">EstimatorSample</a></span>(double&nbsp;sampleFrac)</code>&nbsp;</td>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">estim</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)</code>
<div class="block">Estimates the output sparsity for a single matrix multiplication.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">estim</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,
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<a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.OpCode.html" title="enum in org.apache.sysds.hops.estim">SparsityEstimator.OpCode</a>&nbsp;op)</code>
<div class="block">Estimates the output sparsity for a given binary operation.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">estim</a></span>(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;m,
<a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.OpCode.html" title="enum in org.apache.sysds.hops.estim">SparsityEstimator.OpCode</a>&nbsp;op)</code>
<div class="block">Estimates the output sparsity for a given unary operation.</div>
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<td class="colFirst"><code><a href="../../../../../org/apache/sysds/runtime/meta/DataCharacteristics.html" title="class in org.apache.sysds.runtime.meta">DataCharacteristics</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/sysds/hops/estim/EstimatorSample.html#estim-org.apache.sysds.hops.estim.MMNode-">estim</a></span>(<a href="../../../../../org/apache/sysds/hops/estim/MMNode.html" title="class in org.apache.sysds.hops.estim">MMNode</a>&nbsp;root)</code>
<div class="block">Estimates the output sparsity of a DAG of matrix multiplications
for the given operator graph of a single root node.</div>
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<pre>public&nbsp;EstimatorSample()</pre>
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<pre>public&nbsp;EstimatorSample(double&nbsp;sampleFrac)</pre>
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<pre>public&nbsp;EstimatorSample(double&nbsp;sampleFrac,
boolean&nbsp;extended)</pre>
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<h4>estim</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/sysds/runtime/meta/DataCharacteristics.html" title="class in org.apache.sysds.runtime.meta">DataCharacteristics</a>&nbsp;estim(<a href="../../../../../org/apache/sysds/hops/estim/MMNode.html" title="class in org.apache.sysds.hops.estim">MMNode</a>&nbsp;root)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.hops.estim.MMNode-">SparsityEstimator</a></code></span></div>
<div class="block">Estimates the output sparsity of a DAG of matrix multiplications
for the given operator graph of a single root node.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.hops.estim.MMNode-">estim</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">SparsityEstimator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>root</code> - DAG root node</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>output data characteristics</dd>
</dl>
</li>
</ul>
<a name="estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">
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<h4>estim</h4>
<pre>public&nbsp;double&nbsp;estim(<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)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">SparsityEstimator</a></code></span></div>
<div class="block">Estimates the output sparsity for a single matrix multiplication.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-">estim</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">SparsityEstimator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>m1</code> - left-hand-side operand</dd>
<dd><code>m2</code> - right-hand-side operand</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>sparsity</dd>
</dl>
</li>
</ul>
<a name="estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">
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<h4>estim</h4>
<pre>public&nbsp;double&nbsp;estim(<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/hops/estim/SparsityEstimator.OpCode.html" title="enum in org.apache.sysds.hops.estim">SparsityEstimator.OpCode</a>&nbsp;op)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">SparsityEstimator</a></code></span></div>
<div class="block">Estimates the output sparsity for a given binary operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">estim</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">SparsityEstimator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>m1</code> - left-hand-side operand</dd>
<dd><code>m2</code> - right-hand-side operand</dd>
<dd><code>op</code> - operator code</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>sparsity</dd>
</dl>
</li>
</ul>
<a name="estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">
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<h4>estim</h4>
<pre>public&nbsp;double&nbsp;estim(<a href="../../../../../org/apache/sysds/runtime/matrix/data/MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;m,
<a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.OpCode.html" title="enum in org.apache.sysds.hops.estim">SparsityEstimator.OpCode</a>&nbsp;op)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">SparsityEstimator</a></code></span></div>
<div class="block">Estimates the output sparsity for a given unary operation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html#estim-org.apache.sysds.runtime.matrix.data.MatrixBlock-org.apache.sysds.hops.estim.SparsityEstimator.OpCode-">estim</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/sysds/hops/estim/SparsityEstimator.html" title="class in org.apache.sysds.hops.estim">SparsityEstimator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>m</code> - left-hand-side operand</dd>
<dd><code>op</code> - operator code</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>sparsity</dd>
</dl>
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