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+<title>StatisticsLogger</title>
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+<!-- ======== START OF CLASS DATA ======== -->
+<div class="header">
+<div class="subTitle">jcgp.backend.statistics</div>
+<h2 title="Class StatisticsLogger" class="title">Class StatisticsLogger</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li>java.lang.Object</li>
+<li>
+<ul class="inheritance">
+<li>jcgp.backend.statistics.StatisticsLogger</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">StatisticsLogger</span>
+extends java.lang.Object</pre>
+<div class="block">This is a utility class for logging experiment statistics when doing multiple runs.
+ <br><br>
+ Information about each run is added via the <code>logRun()</code> method. The many getters
+ can be used to obtain statistics about the logged runs, such as success rate and average
+ fitness.
+ <br><br>
+ <code>JCGP</code> uses this class to perform its logging and print out experiment data at the end.</div>
+<dl>
+<dt><span class="simpleTagLabel">Author:</span></dt>
+<dd>Eduardo Pedroni</dd>
+</dl>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- ======== CONSTRUCTOR SUMMARY ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="constructor.summary">
+<!-- -->
+</a>
+<h3>Constructor Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
+<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colOne" scope="col">Constructor and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#StatisticsLogger--">StatisticsLogger</a></span>()</code>
+<div class="block">Create a new statistics logger, use this when resetting is necessary.</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+<!-- ========== METHOD SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.summary">
+<!-- -->
+</a>
+<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">&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>
+<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>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageActiveNodes--">getAverageActiveNodes</a></span>()</code>
+<div class="block">Averages the number of active nodes in the
+ best chromosomes obtained across all runs.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageActiveNodesStdDev--">getAverageActiveNodesStdDev</a></span>()</code>
+<div class="block">Calculates the standard deviation of
+ the number of active nodes in the best solution
+ in each run.</div>
+</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageFitness--">getAverageFitness</a></span>()</code>
+<div class="block">Averages the best fitness obtained in each run.</div>
+</td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageFitnessStdDev--">getAverageFitnessStdDev</a></span>()</code>
+<div class="block">Calculates the standard deviation of
+ the best fitness obtained in each run.</div>
+</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageGenerations--">getAverageGenerations</a></span>()</code>
+<div class="block">Calculates the average generation out of all runs.</div>
+</td>
+</tr>
+<tr id="i5" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageGenerationsStdDev--">getAverageGenerationsStdDev</a></span>()</code>
+<div class="block">Calculates the standard deviation of
+ the average number of generations in
+ each run.</div>
+</td>
+</tr>
+<tr id="i6" class="altColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageSuccessfulGenerations--">getAverageSuccessfulGenerations</a></span>()</code>
+<div class="block">Calculates the average generation out of successful runs only.</div>
+</td>
+</tr>
+<tr id="i7" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getAverageSuccessfulGenerationsStdDev--">getAverageSuccessfulGenerationsStdDev</a></span>()</code>
+<div class="block">Calculates the standard deviation of
+ the average number of generations in
+ each run where a perfect solution was found.</div>
+</td>
+</tr>
+<tr id="i8" class="altColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getHighestFitness--">getHighestFitness</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i9" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getLowestFitness--">getLowestFitness</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i10" class="altColor">
+<td class="colFirst"><code>int</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getSuccessfulRuns--">getSuccessfulRuns</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i11" class="rowColor">
+<td class="colFirst"><code>double</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#getSuccessRate--">getSuccessRate</a></span>()</code>
+<div class="block">Calculates the ratio of successful runs (runs where
+ a perfect solution was found) to total number of runs.</div>
+</td>
+</tr>
+<tr id="i12" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/statistics/StatisticsLogger.html#logRun-int-double-int-boolean-">logRun</a></span>(int&nbsp;generation,
+ double&nbsp;fitness,
+ int&nbsp;active,
+ boolean&nbsp;successful)</code>
+<div class="block">Log a new run.</div>
+</td>
+</tr>
+</table>
+<ul class="blockList">
+<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
+<!-- -->
+</a>
+<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
+<code>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="details">
+<ul class="blockList">
+<li class="blockList">
+<!-- ========= CONSTRUCTOR DETAIL ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="constructor.detail">
+<!-- -->
+</a>
+<h3>Constructor Detail</h3>
+<a name="StatisticsLogger--">
+<!-- -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>StatisticsLogger</h4>
+<pre>public&nbsp;StatisticsLogger()</pre>
+<div class="block">Create a new statistics logger, use this when resetting is necessary.</div>
+</li>
+</ul>
+</li>
+</ul>
+<!-- ============ METHOD DETAIL ========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.detail">
+<!-- -->
+</a>
+<h3>Method Detail</h3>
+<a name="logRun-int-double-int-boolean-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>logRun</h4>
+<pre>public&nbsp;void&nbsp;logRun(int&nbsp;generation,
+ double&nbsp;fitness,
+ int&nbsp;active,
+ boolean&nbsp;successful)</pre>
+<div class="block">Log a new run. Calling any of the statistics getters will
+ now take this logged run into account as well as all previously
+ logged runs.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>generation</code> - the last generation when improvement occurred.</dd>
+<dd><code>fitness</code> - the best fitness achieved in the run.</dd>
+<dd><code>active</code> - the number of active nodes in the best chromosome found.</dd>
+<dd><code>successful</code> - true if a perfect solution was found, false if otherwise.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageFitness--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageFitness</h4>
+<pre>public&nbsp;double&nbsp;getAverageFitness()</pre>
+<div class="block">Averages the best fitness obtained in each run.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the average fitness.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageFitnessStdDev--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageFitnessStdDev</h4>
+<pre>public&nbsp;double&nbsp;getAverageFitnessStdDev()</pre>
+<div class="block">Calculates the standard deviation of
+ the best fitness obtained in each run.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the standard deviation of average fitnesses.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageActiveNodes--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageActiveNodes</h4>
+<pre>public&nbsp;double&nbsp;getAverageActiveNodes()</pre>
+<div class="block">Averages the number of active nodes in the
+ best chromosomes obtained across all runs.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the average number of active nodes.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageActiveNodesStdDev--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageActiveNodesStdDev</h4>
+<pre>public&nbsp;double&nbsp;getAverageActiveNodesStdDev()</pre>
+<div class="block">Calculates the standard deviation of
+ the number of active nodes in the best solution
+ in each run.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the standard deviation of active node counts.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageGenerations--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageGenerations</h4>
+<pre>public&nbsp;double&nbsp;getAverageGenerations()</pre>
+<div class="block">Calculates the average generation out of all runs.
+ The generation value in each run corresponds to the
+ last generation in which improvement happened.
+ <br><br>
+ Note that this method includes runs where no perfect
+ solution was found. For the average number of generations
+ for perfect solutions only, use <code>getAverageSuccessfulGenerations</code>.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the average number of generations.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageGenerationsStdDev--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageGenerationsStdDev</h4>
+<pre>public&nbsp;double&nbsp;getAverageGenerationsStdDev()</pre>
+<div class="block">Calculates the standard deviation of
+ the average number of generations in
+ each run.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the standard deviation of the number of generations.</dd>
+</dl>
+</li>
+</ul>
+<a name="getHighestFitness--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getHighestFitness</h4>
+<pre>public&nbsp;double&nbsp;getHighestFitness()</pre>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the highest fitness across all runs.</dd>
+</dl>
+</li>
+</ul>
+<a name="getLowestFitness--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getLowestFitness</h4>
+<pre>public&nbsp;double&nbsp;getLowestFitness()</pre>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the lowest fitness across all runs.</dd>
+</dl>
+</li>
+</ul>
+<a name="getSuccessfulRuns--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getSuccessfulRuns</h4>
+<pre>public&nbsp;int&nbsp;getSuccessfulRuns()</pre>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the number of runs in which a perfect solution was found.</dd>
+</dl>
+</li>
+</ul>
+<a name="getSuccessRate--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getSuccessRate</h4>
+<pre>public&nbsp;double&nbsp;getSuccessRate()</pre>
+<div class="block">Calculates the ratio of successful runs (runs where
+ a perfect solution was found) to total number of runs.
+ A double-precision value between 0 and 1 is returned,
+ where 0 means 0% success rate and 1 means 100% success rate.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the success rate across all runs.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageSuccessfulGenerations--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getAverageSuccessfulGenerations</h4>
+<pre>public&nbsp;double&nbsp;getAverageSuccessfulGenerations()</pre>
+<div class="block">Calculates the average generation out of successful runs only.
+ The generation value in each successful run corresponds to the
+ generation in which the perfect solution was found.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the average number of generations for perfect solutions.</dd>
+</dl>
+</li>
+</ul>
+<a name="getAverageSuccessfulGenerationsStdDev--">
+<!-- -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>getAverageSuccessfulGenerationsStdDev</h4>
+<pre>public&nbsp;double&nbsp;getAverageSuccessfulGenerationsStdDev()</pre>
+<div class="block">Calculates the standard deviation of
+ the average number of generations in
+ each run where a perfect solution was found.</div>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the standard deviation of the number of generations in successful runs.</dd>
+</dl>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<!-- ========= END OF CLASS DATA ========= -->
+<!-- ======= START OF BOTTOM NAVBAR ====== -->
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