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<div class="subTitle">org.apache.mahout.math.hadoop.stochasticsvd</div>
<h2 title="Class DenseBlockWritable" class="title">Class DenseBlockWritable</h2>
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<dt>All Implemented Interfaces:</dt>
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<pre>public class <span class="typeNameLabel">DenseBlockWritable</span>
extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements org.apache.hadoop.io.Writable</pre>
<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>.
Perhaps more useful for situations with mostly dense data (such as Q-blocks)
but reduces GC by reusing the same block memory between loads and writes.
<p>
in case of Q blocks, it doesn't even matter if they this data is dense cause
we need to unpack it into dense for fast access in computations anyway and
even if it is not so dense the block compressor in sequence files will take
care of it for the serialized size.
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html#DenseBlockWritable--">DenseBlockWritable</a></span>()</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/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html#getBlock--">getBlock</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html#readFields-java.io.DataInput-">readFields</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html#setBlock-double:A:A-">setBlock</a></span>(double[][]&nbsp;block)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/DenseBlockWritable.html#write-java.io.DataOutput-">write</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>&nbsp;out)</code>&nbsp;</td>
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<h4>DenseBlockWritable</h4>
<pre>public&nbsp;DenseBlockWritable()</pre>
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<pre>public&nbsp;void&nbsp;setBlock(double[][]&nbsp;block)</pre>
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<pre>public&nbsp;double[][]&nbsp;getBlock()</pre>
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<pre>public&nbsp;void&nbsp;readFields(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/DataInput.html?is-external=true" title="class or interface in java.io">DataInput</a>&nbsp;in)
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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