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| <div class="subTitle">org.apache.mahout.clustering.lda.cvb</div> |
| <h2 title="Class ModelTrainer" class="title">Class ModelTrainer</h2> |
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| <pre>public class <span class="typeNameLabel">ModelTrainer</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">Multithreaded LDA model trainer class, which primarily operates by running a "map/reduce" |
| operation, all in memory locally (ie not a hadoop job!) : the "map" operation is to take |
| the "read-only" <a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb"><code>TopicModel</code></a> and use it to iteratively learn the p(topic|term, doc) |
| distribution for documents (this can be done in parallel across many documents, as the |
| "read-only" model is, well, read-only. Then the outputs of this are "reduced" onto the |
| "write" model, and these updates are not parallelizable in the same way: individual |
| documents can't be added to the same entries in different threads at the same time, but |
| updates across many topics to the same term from the same document can be done in parallel, |
| so they are. |
| |
| Because computation is done asynchronously, when iteration is done, it's important to call |
| the stop() method, which blocks until work is complete. |
| |
| Setting the read model and the write model to be the same object may not quite work yet, |
| on account of parallelism badness.</div> |
| </li> |
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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/clustering/lda/cvb/ModelTrainer.html#ModelTrainer-org.apache.mahout.clustering.lda.cvb.TopicModel-int-int-int-">ModelTrainer</a></span>(<a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> model, |
| int numTrainThreads, |
| int numTopics, |
| int numTerms)</code> |
| <div class="block">WARNING: this constructor may not lead to good behavior.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#ModelTrainer-org.apache.mahout.clustering.lda.cvb.TopicModel-org.apache.mahout.clustering.lda.cvb.TopicModel-int-int-int-">ModelTrainer</a></span>(<a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> initialReadModel, |
| <a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> initialWriteModel, |
| int numTrainThreads, |
| int numTopics, |
| int numTerms)</code> </td> |
| </tr> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</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> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#batchTrain-java.util.Map-boolean-int-">batchTrain</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</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>,<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>> batch, |
| boolean update, |
| int numDocTopicsIters)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#calculatePerplexity-org.apache.mahout.math.VectorIterable-org.apache.mahout.math.VectorIterable-">calculatePerplexity</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> matrix, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#calculatePerplexity-org.apache.mahout.math.VectorIterable-org.apache.mahout.math.VectorIterable-double-">calculatePerplexity</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> matrix, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts, |
| double testFraction)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#calculatePerplexity-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-int-">calculatePerplexity</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> document, |
| <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> docTopicCounts, |
| int numDocTopicIters)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#getReadModel--">getReadModel</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#persist-org.apache.hadoop.fs.Path-">persist</a></span>(org.apache.hadoop.fs.Path outputPath)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#start--">start</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#stop--">stop</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#train-org.apache.mahout.math.VectorIterable-org.apache.mahout.math.VectorIterable-">train</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> matrix, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#train-org.apache.mahout.math.VectorIterable-org.apache.mahout.math.VectorIterable-int-">train</a></span>(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> matrix, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts, |
| int numDocTopicIters)</code> </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#train-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-boolean-int-">train</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> document, |
| <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> docTopicCounts, |
| boolean update, |
| int numDocTopicIters)</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/clustering/lda/cvb/ModelTrainer.html#trainSync-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-boolean-int-">trainSync</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> document, |
| <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> docTopicCounts, |
| boolean update, |
| int numDocTopicIters)</code> </td> |
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| <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="ModelTrainer-org.apache.mahout.clustering.lda.cvb.TopicModel-org.apache.mahout.clustering.lda.cvb.TopicModel-int-int-int-"> |
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| <h4>ModelTrainer</h4> |
| <pre>public ModelTrainer(<a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> initialReadModel, |
| <a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> initialWriteModel, |
| int numTrainThreads, |
| int numTopics, |
| int numTerms)</pre> |
| </li> |
| </ul> |
| <a name="ModelTrainer-org.apache.mahout.clustering.lda.cvb.TopicModel-int-int-int-"> |
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| <h4>ModelTrainer</h4> |
| <pre>public ModelTrainer(<a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> model, |
| int numTrainThreads, |
| int numTopics, |
| int numTerms)</pre> |
| <div class="block">WARNING: this constructor may not lead to good behavior. What should be verified is that |
| the model updating process does not conflict with model reading. It might work, but then |
| again, it might not!</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - to be used for both reading (inference) and accumulating (learning)</dd> |
| <dd><code>numTrainThreads</code> - </dd> |
| <dd><code>numTopics</code> - </dd> |
| <dd><code>numTerms</code> - </dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <h3>Method Detail</h3> |
| <a name="getReadModel--"> |
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| <h4>getReadModel</h4> |
| <pre>public <a href="../../../../../../org/apache/mahout/clustering/lda/cvb/TopicModel.html" title="class in org.apache.mahout.clustering.lda.cvb">TopicModel</a> getReadModel()</pre> |
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| <h4>start</h4> |
| <pre>public void start()</pre> |
| </li> |
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| <a name="train-org.apache.mahout.math.VectorIterable-org.apache.mahout.math.VectorIterable-"> |
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| <h4>train</h4> |
| <pre>public void train(<a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> matrix, |
| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts)</pre> |
| </li> |
| </ul> |
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| <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/VectorIterable.html?is-external=true" title="class or interface in org.apache.mahout.math">VectorIterable</a> docTopicCounts, |
| double testFraction)</pre> |
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| int numDocTopicsIters)</pre> |
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| int numDocTopicIters)</pre> |
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