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| <div class="subTitle">org.apache.mahout.cf.taste.impl.recommender.svd</div> |
| <h2 title="Class ALSWRFactorizer" class="title">Class ALSWRFactorizer</h2> |
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| <li><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/AbstractFactorizer.html" title="class in org.apache.mahout.cf.taste.impl.recommender.svd">org.apache.mahout.cf.taste.impl.recommender.svd.AbstractFactorizer</a></li> |
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| <li>org.apache.mahout.cf.taste.impl.recommender.svd.ALSWRFactorizer</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../../../org/apache/mahout/cf/taste/common/Refreshable.html" title="interface in org.apache.mahout.cf.taste.common">Refreshable</a>, <a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/Factorizer.html" title="interface in org.apache.mahout.cf.taste.impl.recommender.svd">Factorizer</a></dd> |
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| <pre>public class <span class="typeNameLabel">ALSWRFactorizer</span> |
| extends <a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/AbstractFactorizer.html" title="class in org.apache.mahout.cf.taste.impl.recommender.svd">AbstractFactorizer</a></pre> |
| <div class="block">factorizes the rating matrix using "Alternating-Least-Squares with Weighted-λ-Regularization" as described in |
| <a href="http://www.hpl.hp.com/personal/Robert_Schreiber/papers/2008%20AAIM%20Netflix/netflix_aaim08(submitted).pdf"> |
| "Large-scale Collaborative Filtering for the Netflix Prize"</a> |
| |
| also supports the implicit feedback variant of this approach as described in "Collaborative Filtering for Implicit |
| Feedback Datasets" available at http://research.yahoo.com/pub/2433</div> |
| </li> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#ALSWRFactorizer-org.apache.mahout.cf.taste.model.DataModel-int-double-int-">ALSWRFactorizer</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#ALSWRFactorizer-org.apache.mahout.cf.taste.model.DataModel-int-double-int-boolean-double-">ALSWRFactorizer</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations, |
| boolean usesImplicitFeedback, |
| double alpha)</code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#ALSWRFactorizer-org.apache.mahout.cf.taste.model.DataModel-int-double-int-boolean-double-int-">ALSWRFactorizer</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations, |
| boolean usesImplicitFeedback, |
| double alpha, |
| int numTrainingThreads)</code> </td> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <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></caption> |
| <tr> |
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| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected <a href="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#createQueue--">createQueue</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/Factorization.html" title="class in org.apache.mahout.cf.taste.impl.recommender.svd">Factorization</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#factorize--">factorize</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/map/OpenIntObjectHashMap.html?is-external=true" title="class or interface in org.apache.mahout.math.map">OpenIntObjectHashMap</a><<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/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#itemFeaturesMapping-org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator-int-double:A:A-">itemFeaturesMapping</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/impl/common/LongPrimitiveIterator.html" title="interface in org.apache.mahout.cf.taste.impl.common">LongPrimitiveIterator</a> itemIDs, |
| int numItems, |
| double[][] featureMatrix)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected static <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/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#ratingVector-org.apache.mahout.cf.taste.model.PreferenceArray-">ratingVector</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/PreferenceArray.html" title="interface in org.apache.mahout.cf.taste.model">PreferenceArray</a> prefs)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected <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/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#sparseItemRatingVector-org.apache.mahout.cf.taste.model.PreferenceArray-">sparseItemRatingVector</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/PreferenceArray.html" title="interface in org.apache.mahout.cf.taste.model">PreferenceArray</a> prefs)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected <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/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#sparseUserRatingVector-org.apache.mahout.cf.taste.model.PreferenceArray-">sparseUserRatingVector</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/PreferenceArray.html" title="interface in org.apache.mahout.cf.taste.model">PreferenceArray</a> prefs)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>protected <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/map/OpenIntObjectHashMap.html?is-external=true" title="class or interface in org.apache.mahout.math.map">OpenIntObjectHashMap</a><<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/cf/taste/impl/recommender/svd/ALSWRFactorizer.html#userFeaturesMapping-org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator-int-double:A:A-">userFeaturesMapping</a></span>(<a href="../../../../../../../../org/apache/mahout/cf/taste/impl/common/LongPrimitiveIterator.html" title="interface in org.apache.mahout.cf.taste.impl.common">LongPrimitiveIterator</a> userIDs, |
| int numUsers, |
| double[][] featureMatrix)</code> </td> |
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| <h3>Methods inherited from class org.apache.mahout.cf.taste.impl.recommender.svd.<a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/AbstractFactorizer.html" title="class in org.apache.mahout.cf.taste.impl.recommender.svd">AbstractFactorizer</a></h3> |
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| <h4>ALSWRFactorizer</h4> |
| <pre>public ALSWRFactorizer(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations, |
| boolean usesImplicitFeedback, |
| double alpha, |
| int numTrainingThreads) |
| throws <a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code></dd> |
| </dl> |
| </li> |
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| <h4>ALSWRFactorizer</h4> |
| <pre>public ALSWRFactorizer(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations, |
| boolean usesImplicitFeedback, |
| double alpha) |
| throws <a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code></dd> |
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| <h4>ALSWRFactorizer</h4> |
| <pre>public ALSWRFactorizer(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/DataModel.html" title="interface in org.apache.mahout.cf.taste.model">DataModel</a> dataModel, |
| int numFeatures, |
| double lambda, |
| int numIterations) |
| throws <a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code></dd> |
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| <a name="factorize--"> |
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| <h4>factorize</h4> |
| <pre>public <a href="../../../../../../../../org/apache/mahout/cf/taste/impl/recommender/svd/Factorization.html" title="class in org.apache.mahout.cf.taste.impl.recommender.svd">Factorization</a> factorize() |
| throws <a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../../../../org/apache/mahout/cf/taste/common/TasteException.html" title="class in org.apache.mahout.cf.taste.common">TasteException</a></code></dd> |
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| <a name="createQueue--"> |
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| <h4>createQueue</h4> |
| <pre>protected <a href="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</a> createQueue()</pre> |
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| <pre>protected static <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> ratingVector(<a href="../../../../../../../../org/apache/mahout/cf/taste/model/PreferenceArray.html" title="interface in org.apache.mahout.cf.taste.model">PreferenceArray</a> prefs)</pre> |
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| <pre>protected <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/map/OpenIntObjectHashMap.html?is-external=true" title="class or interface in org.apache.mahout.math.map">OpenIntObjectHashMap</a><<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>> itemFeaturesMapping(<a href="../../../../../../../../org/apache/mahout/cf/taste/impl/common/LongPrimitiveIterator.html" title="interface in org.apache.mahout.cf.taste.impl.common">LongPrimitiveIterator</a> itemIDs, |
| int numItems, |
| double[][] featureMatrix)</pre> |
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| int numUsers, |
| double[][] featureMatrix)</pre> |
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