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+<title>Population</title>
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+<div class="subTitle">jcgp.backend.population</div>
+<h2 title="Class Population" class="title">Class Population</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li>java.lang.Object</li>
+<li>
+<ul class="inheritance">
+<li>jcgp.backend.population.Population</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
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+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">Population</span>
+extends java.lang.Object</pre>
+<div class="block">This class primarily holds a collection of chromosomes. In addition,
+ it provides a few utility methods for manipulating and copying
+ chromosomes, useful for evolutionary strategies.
+ <br><br>
+ <code>copyChromosome()</code> is used to create copies of chromosomes,
+ though it is also possible to create a new instance of population
+ directly from a seed chromosome using the right constructor.
+ <br><br>
+ For convenience, a random chromosome can be retrieved using
+ <code>getRandomChromosome()</code>, which is guaranteed to use the
+ experiment's specified seed. If an entirely random population
+ is needed, <code>reinitialise()</code> should be used to randomise
+ all chromosomes without creating a new instance of <code>Population</code>.</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 ======== -->
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+<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/population/Population.html#Population-jcgp.backend.population.Chromosome-jcgp.backend.resources.Resources-">Population</a></span>(<a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a>&nbsp;parent,
+ <a href="../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a>&nbsp;resources)</code>
+<div class="block">Initialise a population of copies of the given chromosome.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colOne"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#Population-jcgp.backend.resources.Resources-">Population</a></span>(<a href="../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a>&nbsp;resources)</code>
+<div class="block">Initialise a random population according to the parameters specified
+ in the resources.</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>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#copyChromosome-int-int-">copyChromosome</a></span>(int&nbsp;source,
+ int&nbsp;target)</code>
+<div class="block">Copy a chromosome into a different position.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code><a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#get-int-">get</a></span>(int&nbsp;index)</code>
+<div class="block">Returns the indexed chromosome.</div>
+</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code><a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#getRandomChromosome--">getRandomChromosome</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#reinitialise--">reinitialise</a></span>()</code>
+<div class="block">Loop through all chromosomes and randomise all connections
+ and functions.</div>
+</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../jcgp/backend/population/Population.html#sort--">sort</a></span>()</code>
+<div class="block">Sorts the population in ascending order of fitness quality.</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="Population-jcgp.backend.resources.Resources-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>Population</h4>
+<pre>public&nbsp;Population(<a href="../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a>&nbsp;resources)</pre>
+<div class="block">Initialise a random population according to the parameters specified
+ in the resources.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>resources</code> - the experiment's resources.</dd>
+</dl>
+</li>
+</ul>
+<a name="Population-jcgp.backend.population.Chromosome-jcgp.backend.resources.Resources-">
+<!-- -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>Population</h4>
+<pre>public&nbsp;Population(<a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a>&nbsp;parent,
+ <a href="../../../jcgp/backend/resources/Resources.html" title="class in jcgp.backend.resources">Resources</a>&nbsp;resources)</pre>
+<div class="block">Initialise a population of copies of the given chromosome.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>parent</code> - the chromosome to use as a model.</dd>
+<dd><code>resources</code> - a reference to the experiment's resources.</dd>
+</dl>
+</li>
+</ul>
+</li>
+</ul>
+<!-- ============ METHOD DETAIL ========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.detail">
+<!-- -->
+</a>
+<h3>Method Detail</h3>
+<a name="get-int-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>get</h4>
+<pre>public&nbsp;<a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a>&nbsp;get(int&nbsp;index)</pre>
+<div class="block">Returns the indexed chromosome.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>index</code> - the chromosome to return.</dd>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the indexed chromosome.</dd>
+</dl>
+</li>
+</ul>
+<a name="getRandomChromosome--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getRandomChromosome</h4>
+<pre>public&nbsp;<a href="../../../jcgp/backend/population/Chromosome.html" title="class in jcgp.backend.population">Chromosome</a>&nbsp;getRandomChromosome()</pre>
+<dl>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>a random chromosome from this population.</dd>
+</dl>
+</li>
+</ul>
+<a name="copyChromosome-int-int-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>copyChromosome</h4>
+<pre>public&nbsp;void&nbsp;copyChromosome(int&nbsp;source,
+ int&nbsp;target)</pre>
+<div class="block">Copy a chromosome into a different position.
+ After this returns, the target chromosome has
+ identical connections and functions to the source
+ one, though they are separate instances.
+
+ This method does nothing if source == target.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>source</code> - the chromosome to copy from.</dd>
+<dd><code>target</code> - the chromosome to copy to.</dd>
+</dl>
+</li>
+</ul>
+<a name="reinitialise--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>reinitialise</h4>
+<pre>public&nbsp;void&nbsp;reinitialise()</pre>
+<div class="block">Loop through all chromosomes and randomise all connections
+ and functions.</div>
+</li>
+</ul>
+<a name="sort--">
+<!-- -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>sort</h4>
+<pre>public&nbsp;void&nbsp;sort()</pre>
+<div class="block">Sorts the population in ascending order of fitness quality.
+ What this means is that the best fitness chromosome will be
+ in the last position, even though it might have the lowest
+ fitness value. Fitness orientation as specified in the resources
+ is respected.</div>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<!-- ========= END OF CLASS DATA ========= -->
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