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| <div class="subTitle">org.apache.mahout.math.hadoop.stochasticsvd</div> |
| <h2 title="Class Omega" class="title">Class Omega</h2> |
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| <pre>public class <span class="typeNameLabel">Omega</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></pre> |
| <div class="block">simplistic implementation for Omega matrix in Stochastic SVD method</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#Omega-long-int-">Omega</a></span>(long seed, |
| int kp)</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#accumDots-int-double-double:A-">accumDots</a></span>(int aIndex, |
| double aElement, |
| double[] yRow)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#accumDots-int-double-org.apache.mahout.math.Vector-">accumDots</a></span>(int aIndex, |
| double aElement, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> yRow)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#computeYRow-org.apache.mahout.math.Vector-double:A-">computeYRow</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> aRow, |
| double[] yRow)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </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/mahout/math/hadoop/stochasticsvd/Omega.html#computeYRow-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-">computeYRow</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> aRow, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> yRowOut)</code> |
| <div class="block">A version to compute yRow as a sparse vector in case of extremely sparse |
| matrices</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#getQuick-int-int-">getQuick</a></span>(int row, |
| int column)</code> |
| <div class="block">Get omega element at (x,y) uniformly distributed within [-1...1)</div> |
| </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/mahout/math/hadoop/stochasticsvd/Omega.html#murmur64-byte:A-int-int-long-">murmur64</a></span>(byte[] val, |
| int offset, |
| int len, |
| long seed)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#murmur64-long-int-long-">murmur64</a></span>(long val, |
| int len, |
| long seed)</code> |
| <div class="block">Shortened version for data < 8 bytes packed into <code>len</code> lowest bytes |
| of <code>val</code>.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/math/hadoop/stochasticsvd/Omega.html#mutlithreadedTRightMultiply-org.apache.mahout.math.Vector-">mutlithreadedTRightMultiply</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> v)</code> </td> |
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| <a name="Omega-long-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>Omega</h4> |
| <pre>public Omega(long seed, |
| int kp)</pre> |
| </li> |
| </ul> |
| </li> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getQuick</h4> |
| <pre>public double getQuick(int row, |
| int column)</pre> |
| <div class="block">Get omega element at (x,y) uniformly distributed within [-1...1)</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>row</code> - omega row</dd> |
| <dd><code>column</code> - omega column</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="computeYRow-org.apache.mahout.math.Vector-double:A-"> |
| <!-- --> |
| </a> |
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| <h4>computeYRow</h4> |
| <pre><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public void computeYRow(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> aRow, |
| double[] yRow)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| <div class="block">compute YRow=ARow*Omega.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>aRow</code> - row of matrix A (size n)</dd> |
| <dd><code>yRow</code> - row of matrix Y (result) must be pre-allocated to size of (k+p)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="computeYRow-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>computeYRow</h4> |
| <pre>public void computeYRow(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> aRow, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> yRowOut)</pre> |
| <div class="block">A version to compute yRow as a sparse vector in case of extremely sparse |
| matrices</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>aRow</code> - </dd> |
| <dd><code>yRowOut</code> - </dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="mutlithreadedTRightMultiply-org.apache.mahout.math.Vector-"> |
| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>mutlithreadedTRightMultiply</h4> |
| <pre>public <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> mutlithreadedTRightMultiply(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> v)</pre> |
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| <h4>accumDots</h4> |
| <pre>protected void accumDots(int aIndex, |
| double aElement, |
| double[] yRow)</pre> |
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| </a> |
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| <h4>accumDots</h4> |
| <pre>protected void accumDots(int aIndex, |
| double aElement, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Vector.html?is-external=true" title="class or interface in org.apache.mahout.math">Vector</a> yRow)</pre> |
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| <h4>murmur64</h4> |
| <pre>public static long murmur64(long val, |
| int len, |
| long seed)</pre> |
| <div class="block">Shortened version for data < 8 bytes packed into <code>len</code> lowest bytes |
| of <code>val</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>val</code> - the value</dd> |
| <dd><code>len</code> - the length of data packed into this many low bytes of <code>val</code></dd> |
| <dd><code>seed</code> - the seed to use</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>murmur hash</dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
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| <h4>murmur64</h4> |
| <pre>public static long murmur64(byte[] val, |
| int offset, |
| int len, |
| long seed)</pre> |
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| </ul> |
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