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<h1 title="Package" class="title">Package&nbsp;org.apache.mahout.math.hadoop.stochasticsvd</h1>
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<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtDenseOutJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtDenseOutJob</a></td>
<td class="colLast">
<div class="block">Computes ABt products, then first step of QR which is pushed down to the
reducer.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtDenseOutJob.ABtMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtDenseOutJob.ABtMapper</a></td>
<td class="colLast">
<div class="block">So, here, i preload A block into memory.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtDenseOutJob.QRReducer.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtDenseOutJob.QRReducer</a></td>
<td class="colLast">
<div class="block">QR first step pushed down to reducer.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtJob</a></td>
<td class="colLast">
<div class="block">Computes ABt products, then first step of QR which is pushed down to the
reducer.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtJob.ABtMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtJob.ABtMapper</a></td>
<td class="colLast">
<div class="block">So, here, i preload A block into memory.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/ABtJob.QRReducer.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">ABtJob.QRReducer</a></td>
<td class="colLast">
<div class="block">QR first step pushed down to reducer.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/BtJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">BtJob</a></td>
<td class="colLast">
<div class="block">Bt job.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/BtJob.BtMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">BtJob.BtMapper</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/BtJob.OuterProductCombiner.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">BtJob.OuterProductCombiner</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/BtJob.OuterProductReducer.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">BtJob.OuterProductReducer</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">DenseBlockWritable</a></td>
<td class="colLast">
<div class="block">Ad-hoc substitution for <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/MatrixWritable.html?is-external=true" title="class or interface in org.apache.mahout.math"><code>MatrixWritable</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">Omega</a></td>
<td class="colLast">
<div class="block">simplistic implementation for Omega matrix in Stochastic SVD method</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/QJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">QJob</a></td>
<td class="colLast">
<div class="block">Compute first level of QHat-transpose blocks.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/QJob.QMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">QJob.QMapper</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SparseRowBlockAccumulator.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SparseRowBlockAccumulator</a></td>
<td class="colLast">
<div class="block">Aggregate incoming rows into blocks based on the row number (long).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SparseRowBlockWritable.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SparseRowBlockWritable</a></td>
<td class="colLast">
<div class="block">block that supports accumulating rows and their sums , suitable for combiner
and reducers of multiplication jobs.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SplitPartitionedWritable.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SplitPartitionedWritable</a></td>
<td class="colLast">
<div class="block">a key for vectors allowing to identify them by their coordinates in original
split of A.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SplitPartitionedWritable.SplitGroupingComparator.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SplitPartitionedWritable.SplitGroupingComparator</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SSVDCli.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SSVDCli</a></td>
<td class="colLast">
<div class="block">Mahout CLI adapter for SSVDSolver</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SSVDHelper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SSVDHelper</a></td>
<td class="colLast">
<div class="block">set of small file manipulation helpers.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/SSVDSolver.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">SSVDSolver</a></td>
<td class="colLast">
<div class="block">Stochastic SVD solver (API class).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/UJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">UJob</a></td>
<td class="colLast">
<div class="block">Computes U=Q*Uhat of SSVD (optionally adding x pow(Sigma, 0.5) )</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/UJob.UMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">UJob.UMapper</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/VJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">VJob</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/VJob.VMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">VJob.VMapper</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/YtYJob.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">YtYJob</a></td>
<td class="colLast">
<div class="block">Job that accumulates Y'Y output</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/YtYJob.YtYMapper.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">YtYJob.YtYMapper</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/YtYJob.YtYReducer.html" title="class in org.apache.mahout.math.hadoop.stochasticsvd">YtYJob.YtYReducer</a></td>
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