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| <div class="subTitle">org.apache.mahout.classifier.sequencelearning.hmm</div> |
| <h2 title="Class HmmUtils" class="title">Class HmmUtils</h2> |
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| <pre>public final class <span class="typeNameLabel">HmmUtils</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">A collection of utilities for handling HMMModel objects.</div> |
| </li> |
| </ul> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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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="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>static <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><<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>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#decodeStateSequence-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-int:A-boolean-java.lang.String-">decodeStateSequence</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| int[] sequence, |
| boolean observed, |
| <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> defaultValue)</code> |
| <div class="block">Decodes a given collection of state IDs into the corresponding state names |
| registered in a given model.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static int[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#encodeStateSequence-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-java.util.Collection-boolean-int-">encodeStateSequence</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<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>> sequence, |
| boolean observed, |
| int defaultValue)</code> |
| <div class="block">Encodes a given collection of state names by the corresponding state IDs |
| registered in a given model.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>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/classifier/sequencelearning/hmm/HmmUtils.html#getCumulativeInitialProbabilities-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-">getCumulativeInitialProbabilities</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</code> |
| <div class="block">Compute the cumulative distribution of the initial hidden state |
| probabilities for the given HMM model.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Matrix.html?is-external=true" title="class or interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#getCumulativeOutputMatrix-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-">getCumulativeOutputMatrix</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</code> |
| <div class="block">Compute the cumulative output probability matrix for the given HMM model.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Matrix.html?is-external=true" title="class or interface in org.apache.mahout.math">Matrix</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#getCumulativeTransitionMatrix-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-">getCumulativeTransitionMatrix</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</code> |
| <div class="block">Compute the cumulative transition probability matrix for the given HMM |
| model.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#normalizeModel-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-">normalizeModel</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</code> |
| <div class="block">Function used to normalize the probabilities of a given HMM model</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#truncateModel-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-double-">truncateModel</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| double threshold)</code> |
| <div class="block">Method to reduce the size of an HMMmodel by converting the models |
| DenseMatrix/DenseVectors to sparse implementations and setting every value |
| < threshold to 0</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmUtils.html#validate-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-">validate</a></span>(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</code> |
| <div class="block">Validates an HMM model set</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Methods inherited from class java.lang.<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></h3> |
| <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> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <h3>Method Detail</h3> |
| <a name="getCumulativeTransitionMatrix-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>getCumulativeTransitionMatrix</h4> |
| <pre>public static <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Matrix.html?is-external=true" title="class or interface in org.apache.mahout.math">Matrix</a> getCumulativeTransitionMatrix(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</pre> |
| <div class="block">Compute the cumulative transition probability matrix for the given HMM |
| model. Matrix where each row i is the cumulative distribution of the |
| transition probability distribution for hidden state i.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - The HMM model for which the cumulative transition matrix should be |
| computed</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The computed cumulative transition matrix.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCumulativeOutputMatrix-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-"> |
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| <h4>getCumulativeOutputMatrix</h4> |
| <pre>public static <a href="http://mahout.apache.org/mahout-math/apidocs/org/apache/mahout/math/Matrix.html?is-external=true" title="class or interface in org.apache.mahout.math">Matrix</a> getCumulativeOutputMatrix(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</pre> |
| <div class="block">Compute the cumulative output probability matrix for the given HMM model. |
| Matrix where each row i is the cumulative distribution of the output |
| probability distribution for hidden state i.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - The HMM model for which the cumulative output matrix should be |
| computed</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The computed cumulative output matrix.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCumulativeInitialProbabilities-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-"> |
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| </a> |
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| <h4>getCumulativeInitialProbabilities</h4> |
| <pre>public 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> getCumulativeInitialProbabilities(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</pre> |
| <div class="block">Compute the cumulative distribution of the initial hidden state |
| probabilities for the given HMM model.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - The HMM model for which the cumulative initial state probabilities |
| should be computed</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The computed cumulative initial state probability vector.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="validate-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-"> |
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| </a> |
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| <h4>validate</h4> |
| <pre>public static void validate(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</pre> |
| <div class="block">Validates an HMM model set</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - model to sanity check.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="encodeStateSequence-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-java.util.Collection-boolean-int-"> |
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| <h4>encodeStateSequence</h4> |
| <pre>public static int[] encodeStateSequence(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<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>> sequence, |
| boolean observed, |
| int defaultValue)</pre> |
| <div class="block">Encodes a given collection of state names by the corresponding state IDs |
| registered in a given model.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - Model to provide the encoding for</dd> |
| <dd><code>sequence</code> - Collection of state names</dd> |
| <dd><code>observed</code> - If set, the sequence is encoded as a sequence of observed states, |
| else it is encoded as sequence of hidden states</dd> |
| <dd><code>defaultValue</code> - The default value in case a state is not known</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>integer array containing the encoded state IDs</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="decodeStateSequence-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-int:A-boolean-java.lang.String-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>decodeStateSequence</h4> |
| <pre>public static <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><<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>> decodeStateSequence(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| int[] sequence, |
| boolean observed, |
| <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> defaultValue)</pre> |
| <div class="block">Decodes a given collection of state IDs into the corresponding state names |
| registered in a given model.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - model to use for retrieving state names</dd> |
| <dd><code>sequence</code> - int array of state IDs</dd> |
| <dd><code>observed</code> - If set, the sequence is encoded as a sequence of observed states, |
| else it is encoded as sequence of hidden states</dd> |
| <dd><code>defaultValue</code> - The default value in case a state is not known</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>list containing the decoded state names</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="normalizeModel-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-"> |
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| </a> |
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| <h4>normalizeModel</h4> |
| <pre>public static void normalizeModel(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model)</pre> |
| <div class="block">Function used to normalize the probabilities of a given HMM model</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - model to normalize</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="truncateModel-org.apache.mahout.classifier.sequencelearning.hmm.HmmModel-double-"> |
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| </a> |
| <ul class="blockListLast"> |
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| <h4>truncateModel</h4> |
| <pre>public static <a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> truncateModel(<a href="../../../../../../org/apache/mahout/classifier/sequencelearning/hmm/HmmModel.html" title="class in org.apache.mahout.classifier.sequencelearning.hmm">HmmModel</a> model, |
| double threshold)</pre> |
| <div class="block">Method to reduce the size of an HMMmodel by converting the models |
| DenseMatrix/DenseVectors to sparse implementations and setting every value |
| < threshold to 0</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>model</code> - model to truncate</dd> |
| <dd><code>threshold</code> - minimum value a model entry must have to be retained.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Truncated model</dd> |
| </dl> |
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