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<div class="subTitle">org.apache.mahout.classifier</div>
<h2 title="Class ConfusionMatrix" class="title">Class ConfusionMatrix</h2>
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<pre>public class <span class="typeNameLabel">ConfusionMatrix</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">The ConfusionMatrix Class stores the result of Classification of a Test Dataset.
The fact of whether there is a default is not stored. A row of zeros is the only indicator that there is no default.
See http://en.wikipedia.org/wiki/Confusion_matrix for background</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#ConfusionMatrix-java.util.Collection-java.lang.String-">ConfusionMatrix</a></span>(<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>&lt;<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>&gt;&nbsp;labels,
<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;defaultLabel)</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#ConfusionMatrix-org.apache.mahout.math.Matrix-">ConfusionMatrix</a></span>(<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>&nbsp;m)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</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>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#addInstance-java.lang.String-org.apache.mahout.classifier.ClassifierResult-">addInstance</a></span>(<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;correctLabel,
<a href="../../../../org/apache/mahout/classifier/ClassifierResult.html" title="class in org.apache.mahout.classifier">ClassifierResult</a>&nbsp;classifiedResult)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#addInstance-java.lang.String-java.lang.String-">addInstance</a></span>(<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;correctLabel,
<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;classifiedLabel)</code>&nbsp;</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/classifier/ConfusionMatrix.html#getAccuracy--">getAccuracy</a></span>()</code>&nbsp;</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/classifier/ConfusionMatrix.html#getAccuracy-java.lang.String-">getAccuracy</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>int[][]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getConfusionMatrix--">getConfusionMatrix</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getCorrect-java.lang.String-">getCorrect</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getCount-java.lang.String-java.lang.String-">getCount</a></span>(<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;correctLabel,
<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;classifiedLabel)</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code><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/ConfusionMatrix.html#getDefaultLabel--">getDefaultLabel</a></span>()</code>&nbsp;</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getF1score-java.lang.String-">getF1score</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getKappa--">getKappa</a></span>()</code>
<div class="block">Accuracy v.s.</div>
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<tr id="i10" class="altColor">
<td class="colFirst"><code><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>&lt;<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>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getLabels--">getLabels</a></span>()</code>&nbsp;</td>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code><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/ConfusionMatrix.html#getMatrix--">getMatrix</a></span>()</code>&nbsp;</td>
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<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/mahout/cf/taste/impl/common/RunningAverageAndStdDev.html" title="interface in org.apache.mahout.cf.taste.impl.common">RunningAverageAndStdDev</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getNormalizedStats--">getNormalizedStats</a></span>()</code>
<div class="block">Standard deviation of normalized producer accuracy
Not a standard score</div>
</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getPrecision-java.lang.String-">getPrecision</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getRecall-java.lang.String-">getRecall</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getReliability--">getReliability</a></span>()</code>&nbsp;</td>
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<tr id="i16" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getTotal-java.lang.String-">getTotal</a></span>(<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;label)</code>&nbsp;</td>
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<tr id="i17" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getWeightedF1score--">getWeightedF1score</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getWeightedPrecision--">getWeightedPrecision</a></span>()</code>&nbsp;</td>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#getWeightedRecall--">getWeightedRecall</a></span>()</code>&nbsp;</td>
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<tr id="i20" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#incrementCount-java.lang.String-java.lang.String-">incrementCount</a></span>(<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;correctLabel,
<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;classifiedLabel)</code>&nbsp;</td>
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<tr id="i21" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#incrementCount-java.lang.String-java.lang.String-int-">incrementCount</a></span>(<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;correctLabel,
<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;classifiedLabel,
int&nbsp;count)</code>&nbsp;</td>
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<tr id="i22" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html" title="class in org.apache.mahout.classifier">ConfusionMatrix</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#merge-org.apache.mahout.classifier.ConfusionMatrix-">merge</a></span>(<a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html" title="class in org.apache.mahout.classifier">ConfusionMatrix</a>&nbsp;b)</code>&nbsp;</td>
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<tr id="i23" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#putCount-java.lang.String-java.lang.String-int-">putCount</a></span>(<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;correctLabel,
<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;classifiedLabel,
int&nbsp;count)</code>&nbsp;</td>
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<tr id="i24" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mahout/classifier/ConfusionMatrix.html#setMatrix-org.apache.mahout.math.Matrix-">setMatrix</a></span>(<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>&nbsp;m)</code>&nbsp;</td>
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<tr id="i25" class="rowColor">
<td class="colFirst"><code><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/ConfusionMatrix.html#toString--">toString</a></span>()</code>
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<h4>ConfusionMatrix</h4>
<pre>public&nbsp;ConfusionMatrix(<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>&lt;<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>&gt;&nbsp;labels,
<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;defaultLabel)</pre>
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<pre>public&nbsp;ConfusionMatrix(<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>&nbsp;m)</pre>
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<pre>public&nbsp;int[][]&nbsp;getConfusionMatrix()</pre>
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<pre>public&nbsp;double&nbsp;getAccuracy(<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;label)</pre>
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<pre>public&nbsp;double&nbsp;getAccuracy()</pre>
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<pre>public&nbsp;double&nbsp;getWeightedPrecision()</pre>
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<pre>public&nbsp;double&nbsp;getRecall(<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;label)</pre>
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<pre>public&nbsp;double&nbsp;getWeightedRecall()</pre>
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<pre>public&nbsp;double&nbsp;getF1score(<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;label)</pre>
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<pre>public&nbsp;double&nbsp;getKappa()</pre>
<div class="block">Accuracy v.s. randomly classifying all samples.
kappa() = (totalAccuracy() - randomAccuracy()) / (1 - randomAccuracy())
Cohen, Jacob. 1960. A coefficient of agreement for nominal scales.
Educational And Psychological Measurement 20:37-46.
Formula and variable names from:
http://www.yale.edu/ceo/OEFS/Accuracy.pdf</div>
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<div class="block">Standard deviation of normalized producer accuracy
Not a standard score</div>
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<div class="block">This is overloaded. toString() is not a formatted report you print for a manager :)
Assume that if there are no default assignments, the default feature was not used</div>
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