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<div class="subTitle">org.apache.mahout.clustering.classify</div>
<h2 title="Class ClusterClassifier" class="title">Class ClusterClassifier</h2>
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<li><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">org.apache.mahout.classifier.AbstractVectorClassifier</a></li>
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<li>org.apache.mahout.clustering.classify.ClusterClassifier</li>
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<dd><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, org.apache.hadoop.io.Writable, <a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a></dd>
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<pre>public class <span class="typeNameLabel">ClusterClassifier</span>
extends <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">AbstractVectorClassifier</a>
implements <a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a>, org.apache.hadoop.io.Writable</pre>
<div class="block">This classifier works with any ClusteringPolicy and its associated Clusters.
It is initialized with a policy and a list of compatible clusters and
thereafter it can classify any new Vector into one or more of the clusters
based upon the pdf() function which each cluster supports.
<p/>
In addition, it is an OnlineLearner and can be trained. Training amounts to
asking the actual model to observe the vector and closing the classifier
causes all the models to computeParameters.
<p/>
Because a ClusterClassifier implements Writable, it can be written-to and
read-from a sequence file as a single entity. For sequential and MapReduce
clustering in conjunction with a ClusterIterator; however, it utilizes an
exploded file format. In this format, the iterator writes the policy to a
single POLICY_FILE_NAME file in the clustersOut directory and the models are
written to one or more part-n files so that multiple reducers may employed to
produce them.</div>
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<h3>Fields inherited from class&nbsp;org.apache.mahout.classifier.<a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">AbstractVectorClassifier</a></h3>
<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#MIN_LOG_LIKELIHOOD">MIN_LOG_LIKELIHOOD</a></code></li>
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<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#ClusterClassifier--">ClusterClassifier</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#ClusterClassifier-org.apache.mahout.clustering.iterator.ClusteringPolicy-">ClusterClassifier</a></span>(<a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a>&nbsp;policy)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#ClusterClassifier-java.util.List-org.apache.mahout.clustering.iterator.ClusteringPolicy-">ClusterClassifier</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/mahout/clustering/Cluster.html" title="interface in org.apache.mahout.clustering">Cluster</a>&gt;&nbsp;models,
<a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a>&nbsp;policy)</code>
<div class="block">The public constructor accepts a list of clusters to become the models</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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</tr>
<tr id="i0" class="altColor">
<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/clustering/classify/ClusterClassifier.html#classify-org.apache.mahout.math.Vector-">classify</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>&nbsp;instance)</code>
<div class="block">Compute and return a vector containing <code>n-1</code> scores, where
<code>n</code> is equal to <code>numCategories()</code>, given an input
vector <code>instance</code>.</div>
</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/classify/ClusterClassifier.html#classifyScalar-org.apache.mahout.math.Vector-">classifyScalar</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>&nbsp;instance)</code>
<div class="block">Classifies a vector in the special case of a binary classifier where
<a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Vector-"><code>AbstractVectorClassifier.classify(Vector)</code></a> would return a vector with only one element.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#close--">close</a></span>()</code>
<div class="block">Prepares the classifier for classification and deallocates any temporary data structures.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/mahout/clustering/Cluster.html" title="interface in org.apache.mahout.clustering">Cluster</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#getModels--">getModels</a></span>()</code>&nbsp;</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#getPolicy--">getPolicy</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#numCategories--">numCategories</a></span>()</code>
<div class="block">Returns the number of categories that a target variable can be assigned to.</div>
</td>
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<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/classify/ClusterClassifier.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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<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/classify/ClusterClassifier.html#readFromSeqFiles-org.apache.hadoop.conf.Configuration-org.apache.hadoop.fs.Path-">readFromSeqFiles</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
org.apache.hadoop.fs.Path&nbsp;path)</code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#readPolicy-org.apache.hadoop.fs.Path-">readPolicy</a></span>(org.apache.hadoop.fs.Path&nbsp;path)</code>&nbsp;</td>
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<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/classify/ClusterClassifier.html#train-int-org.apache.mahout.math.Vector-">train</a></span>(int&nbsp;actual,
<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>&nbsp;instance)</code>
<div class="block">Updates the model using a particular target variable value and a feature vector.</div>
</td>
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<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/classify/ClusterClassifier.html#train-int-org.apache.mahout.math.Vector-double-">train</a></span>(int&nbsp;actual,
<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>&nbsp;data,
double&nbsp;weight)</code>
<div class="block">Train the models given an additional weight.</div>
</td>
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<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/classify/ClusterClassifier.html#train-long-int-org.apache.mahout.math.Vector-">train</a></span>(long&nbsp;trackingKey,
int&nbsp;actual,
<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>&nbsp;instance)</code>
<div class="block">Updates the model using a particular target variable value and a feature vector.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#train-long-java.lang.String-int-org.apache.mahout.math.Vector-">train</a></span>(long&nbsp;trackingKey,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;groupKey,
int&nbsp;actual,
<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>&nbsp;instance)</code>
<div class="block">Updates the model using a particular target variable value and a feature vector.</div>
</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.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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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#writePolicy-org.apache.mahout.clustering.iterator.ClusteringPolicy-org.apache.hadoop.fs.Path-">writePolicy</a></span>(<a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a>&nbsp;policy,
org.apache.hadoop.fs.Path&nbsp;path)</code>&nbsp;</td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/clustering/classify/ClusterClassifier.html#writeToSeqFiles-org.apache.hadoop.fs.Path-">writeToSeqFiles</a></span>(org.apache.hadoop.fs.Path&nbsp;path)</code>&nbsp;</td>
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<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Matrix-">classify</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyFull-org.apache.mahout.math.Matrix-">classifyFull</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyFull-org.apache.mahout.math.Vector-">classifyFull</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyFull-org.apache.mahout.math.Vector-org.apache.mahout.math.Vector-">classifyFull</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyNoLink-org.apache.mahout.math.Vector-">classifyNoLink</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyScalar-org.apache.mahout.math.Matrix-">classifyScalar</a>, <a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#logLikelihood-int-org.apache.mahout.math.Vector-">logLikelihood</a></code></li>
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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>
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<h4>ClusterClassifier</h4>
<pre>public&nbsp;ClusterClassifier(<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/mahout/clustering/Cluster.html" title="interface in org.apache.mahout.clustering">Cluster</a>&gt;&nbsp;models,
<a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a>&nbsp;policy)</pre>
<div class="block">The public constructor accepts a list of clusters to become the models</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>models</code> - a List<Cluster></dd>
<dd><code>policy</code> - a ClusteringPolicy</dd>
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<pre>public&nbsp;ClusterClassifier()</pre>
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<pre>protected&nbsp;ClusterClassifier(<a href="../../../../../org/apache/mahout/clustering/iterator/ClusteringPolicy.html" title="interface in org.apache.mahout.clustering.iterator">ClusteringPolicy</a>&nbsp;policy)</pre>
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<pre>public&nbsp;<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>&nbsp;classify(<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>&nbsp;instance)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Vector-">AbstractVectorClassifier</a></code></span></div>
<div class="block">Compute and return a vector containing <code>n-1</code> scores, where
<code>n</code> is equal to <code>numCategories()</code>, given an input
vector <code>instance</code>. Higher scores indicate that the input vector
is more likely to belong to that category. The categories are denoted by
the integers <code>0</code> through <code>n-1</code> (inclusive), and the
scores in the returned vector correspond to categories 1 through
<code>n-1</code> (leaving out category 0). It is assumed that the score for
category 0 is one minus the sum of the scores in the returned vector.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Vector-">classify</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">AbstractVectorClassifier</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>instance</code> - A feature vector to be classified.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A vector of probabilities in 1 of <code>n-1</code> encoding.</dd>
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<pre>public&nbsp;double&nbsp;classifyScalar(<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>&nbsp;instance)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyScalar-org.apache.mahout.math.Vector-">AbstractVectorClassifier</a></code></span></div>
<div class="block">Classifies a vector in the special case of a binary classifier where
<a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Vector-"><code>AbstractVectorClassifier.classify(Vector)</code></a> would return a vector with only one element. As
such, using this method can avoid the allocation of a vector.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classifyScalar-org.apache.mahout.math.Vector-">classifyScalar</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">AbstractVectorClassifier</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>instance</code> - The feature vector to be classified.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The score for category 1.</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#classify-org.apache.mahout.math.Vector-"><code>AbstractVectorClassifier.classify(Vector)</code></a></dd>
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<div class="block">Returns the number of categories that a target variable can be assigned to.
A vector classifier will encode it's output as an integer from
<code>0</code> to <code>numCategories()-1</code> (inclusive).</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html#numCategories--">numCategories</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/AbstractVectorClassifier.html" title="class in org.apache.mahout.classifier">AbstractVectorClassifier</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The number of categories.</dd>
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<dd><code><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></code></dd>
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<dd><code>readFields</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.io.Writable</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><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></code></dd>
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<pre>public&nbsp;void&nbsp;train(int&nbsp;actual,
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-int-org.apache.mahout.math.Vector-">OnlineLearner</a></code></span></div>
<div class="block">Updates the model using a particular target variable value and a feature vector.
<p/>
There may an assumption that if multiple passes through the training data are necessary, then
the training examples will be presented in the same order. This is because the order of
training examples may be used to assign records to different data splits for evaluation by
cross-validation. Without the order invariance, records might be assigned to training and test
splits and error estimates could be seriously affected.
<p/>
If re-ordering is necessary, then using the alternative API which allows a tracking key to be
added to the training example can be used.</div>
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<dd><code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-int-org.apache.mahout.math.Vector-">train</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>actual</code> - The value of the target variable. This value should be in the half-open
interval [0..n) where n is the number of target categories.</dd>
<dd><code>instance</code> - The feature vector for this example.</dd>
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<div class="block">Train the models given an additional weight. Unique to ClusterClassifier</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>actual</code> - the int index of a model</dd>
<dd><code>data</code> - a data Vector</dd>
<dd><code>weight</code> - a double weighting factor</dd>
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<pre>public&nbsp;void&nbsp;train(long&nbsp;trackingKey,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;groupKey,
int&nbsp;actual,
<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>&nbsp;instance)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-long-java.lang.String-int-org.apache.mahout.math.Vector-">OnlineLearner</a></code></span></div>
<div class="block">Updates the model using a particular target variable value and a feature vector.
<p/>
There may an assumption that if multiple passes through the training data are necessary that
the tracking key for a record will be the same for each pass and that there will be a
relatively large number of distinct tracking keys and that the low-order bits of the tracking
keys will not correlate with any of the input variables. This tracking key is used to assign
training examples to different test/training splits.
<p/>
Examples of useful tracking keys include id-numbers for the training records derived from
a database id for the base table from the which the record is derived, or the offset of
the original data record in a data file.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-long-java.lang.String-int-org.apache.mahout.math.Vector-">train</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>trackingKey</code> - The tracking key for this training example.</dd>
<dd><code>groupKey</code> - An optional value that allows examples to be grouped in the computation of
the update to the model.</dd>
<dd><code>actual</code> - The value of the target variable. This value should be in the half-open
interval [0..n) where n is the number of target categories.</dd>
<dd><code>instance</code> - The feature vector for this example.</dd>
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<pre>public&nbsp;void&nbsp;train(long&nbsp;trackingKey,
int&nbsp;actual,
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-long-int-org.apache.mahout.math.Vector-">OnlineLearner</a></code></span></div>
<div class="block">Updates the model using a particular target variable value and a feature vector.
<p/>
There may an assumption that if multiple passes through the training data are necessary that
the tracking key for a record will be the same for each pass and that there will be a
relatively large number of distinct tracking keys and that the low-order bits of the tracking
keys will not correlate with any of the input variables. This tracking key is used to assign
training examples to different test/training splits.
<p/>
Examples of useful tracking keys include id-numbers for the training records derived from
a database id for the base table from the which the record is derived, or the offset of
the original data record in a data file.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#train-long-int-org.apache.mahout.math.Vector-">train</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>trackingKey</code> - The tracking key for this training example.</dd>
<dd><code>actual</code> - The value of the target variable. This value should be in the half-open
interval [0..n) where n is the number of target categories.</dd>
<dd><code>instance</code> - The feature vector for this example.</dd>
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<div class="block">Prepares the classifier for classification and deallocates any temporary data structures.
An online classifier should be able to accept more training after being closed, but
closing the classifier may make classification more efficient.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html#close--">close</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/mahout/classifier/OnlineLearner.html" title="interface in org.apache.mahout.classifier">OnlineLearner</a></code></dd>
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<pre>public&nbsp;<a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/mahout/clustering/Cluster.html" title="interface in org.apache.mahout.clustering">Cluster</a>&gt;&nbsp;getModels()</pre>
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org.apache.hadoop.fs.Path&nbsp;path)
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<dd><code><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></code></dd>
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