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<h1 title="Package" class="title">Package&nbsp;org.apache.commons.math3.stat.descriptive</h1>
<div class="docSummary">
<div class="block">Generic univariate summary statistic objects.</div>
</div>
<p>See:&nbsp;<a href="#package_description">Description</a></p>
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<table class="packageSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation">
<caption><span>Interface Summary</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/StatisticalMultivariateSummary.html" title="interface in org.apache.commons.math3.stat.descriptive">StatisticalMultivariateSummary</a></td>
<td class="colLast">
<div class="block">Reporting interface for basic multivariate statistics.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/StatisticalSummary.html" title="interface in org.apache.commons.math3.stat.descriptive">StatisticalSummary</a></td>
<td class="colLast">
<div class="block">Reporting interface for basic univariate statistics.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/StorelessUnivariateStatistic.html" title="interface in org.apache.commons.math3.stat.descriptive">StorelessUnivariateStatistic</a></td>
<td class="colLast">
<div class="block">Extends the definition of <a href="../../../../../../org/apache/commons/math3/stat/descriptive/UnivariateStatistic.html" title="interface in org.apache.commons.math3.stat.descriptive"><code>UnivariateStatistic</code></a> with
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/StorelessUnivariateStatistic.html#increment(double)"><code>StorelessUnivariateStatistic.increment(double)</code></a> and <a href="../../../../../../org/apache/commons/math3/stat/descriptive/StorelessUnivariateStatistic.html#incrementAll(double[])"><code>StorelessUnivariateStatistic.incrementAll(double[])</code></a> methods for adding
values and updating internal state.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/UnivariateStatistic.html" title="interface in org.apache.commons.math3.stat.descriptive">UnivariateStatistic</a></td>
<td class="colLast">
<div class="block">Base interface implemented by all statistics.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/WeightedEvaluation.html" title="interface in org.apache.commons.math3.stat.descriptive">WeightedEvaluation</a></td>
<td class="colLast">
<div class="block">Weighted evaluation for statistics.</div>
</td>
</tr>
</tbody>
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<caption><span>Class Summary</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/AbstractStorelessUnivariateStatistic.html" title="class in org.apache.commons.math3.stat.descriptive">AbstractStorelessUnivariateStatistic</a></td>
<td class="colLast">
<div class="block">Abstract implementation of the <a href="../../../../../../org/apache/commons/math3/stat/descriptive/StorelessUnivariateStatistic.html" title="interface in org.apache.commons.math3.stat.descriptive"><code>StorelessUnivariateStatistic</code></a> interface.</div>
</td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/AbstractUnivariateStatistic.html" title="class in org.apache.commons.math3.stat.descriptive">AbstractUnivariateStatistic</a></td>
<td class="colLast">
<div class="block">Abstract base class for all implementations of the
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/UnivariateStatistic.html" title="interface in org.apache.commons.math3.stat.descriptive"><code>UnivariateStatistic</code></a> interface.</div>
</td>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/AggregateSummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">AggregateSummaryStatistics</a></td>
<td class="colLast">
<div class="block">
An aggregator for <code>SummaryStatistics</code> from several data sets or
data set partitions.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/DescriptiveStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">DescriptiveStatistics</a></td>
<td class="colLast">
<div class="block">Maintains a dataset of values of a single variable and computes descriptive
statistics based on stored data.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/MultivariateSummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">MultivariateSummaryStatistics</a></td>
<td class="colLast">
<div class="block">Computes summary statistics for a stream of n-tuples added using the
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/MultivariateSummaryStatistics.html#addValue(double[])"><code>addValue</code></a> method.</div>
</td>
</tr>
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<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/StatisticalSummaryValues.html" title="class in org.apache.commons.math3.stat.descriptive">StatisticalSummaryValues</a></td>
<td class="colLast">
<div class="block">Value object representing the results of a univariate statistical summary.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/SummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">SummaryStatistics</a></td>
<td class="colLast">
<div class="block">
Computes summary statistics for a stream of data values added using the
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/SummaryStatistics.html#addValue(double)"><code>addValue</code></a> method.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/SynchronizedDescriptiveStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">SynchronizedDescriptiveStatistics</a></td>
<td class="colLast">
<div class="block">Implementation of
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/DescriptiveStatistics.html" title="class in org.apache.commons.math3.stat.descriptive"><code>DescriptiveStatistics</code></a> that
is safe to use in a multithreaded environment.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/SynchronizedMultivariateSummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">SynchronizedMultivariateSummaryStatistics</a></td>
<td class="colLast">
<div class="block">Implementation of
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/MultivariateSummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive"><code>MultivariateSummaryStatistics</code></a> that
is safe to use in a multithreaded environment.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="../../../../../../org/apache/commons/math3/stat/descriptive/SynchronizedSummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive">SynchronizedSummaryStatistics</a></td>
<td class="colLast">
<div class="block">Implementation of
<a href="../../../../../../org/apache/commons/math3/stat/descriptive/SummaryStatistics.html" title="class in org.apache.commons.math3.stat.descriptive"><code>SummaryStatistics</code></a> that
is safe to use in a multithreaded environment.</div>
</td>
</tr>
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<!-- -->
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<h2 title="Package org.apache.commons.math3.stat.descriptive Description">Package org.apache.commons.math3.stat.descriptive Description</h2>
<div class="block">Generic univariate summary statistic objects.
<h3>UnivariateStatistic API Usage Examples:</h3>
<h4>UnivariateStatistic:</h4>
<code>/&lowast; evaluation approach &lowast;/<br/>
double[] values = new double[] { 1, 2, 3, 4, 5 };<br/>
<span style="font-weight: bold;">UnivariateStatistic stat = new Mean();</span><br/>
out.println("mean = " + <span style="font-weight: bold;">stat.evaluate(values)</span>);<br/>
</code>
<h4>StorelessUnivariateStatistic:</h4>
<code>/&lowast; incremental approach &lowast;/<br/>
double[] values = new double[] { 1, 2, 3, 4, 5 };<br/>
<span style="font-weight: bold;">StorelessUnivariateStatistic stat = new Mean();</span><br/>
out.println("mean before adding a value is NaN = " + <span style="font-weight: bold;">stat.getResult()</span>);<br/>
for (int i = 0; i &lt; values.length; i++) {<br/>
&nbsp;&nbsp;&nbsp; <span style="font-weight: bold;">stat.increment(values[i]);</span><br/>
&nbsp;&nbsp;&nbsp; out.println("current mean = " + <span style="font-weight: bold;">stat2.getResult()</span>);<br/>
}<br/>
<span style="font-weight: bold;"> stat.clear();</span><br/>
out.println("mean after clear is NaN = " + <span style="font-weight: bold;">stat.getResult()</span>);
</code></div>
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