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<div class="subTitle">org.apache.commons.math3.genetics</div>
<h2 title="Class OrderedCrossover" class="title">Class OrderedCrossover<T></h2>
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<dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - generic type of the <a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics"><code>AbstractListChromosome</code></a>s for crossover</dd></dl>
<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../org/apache/commons/math3/genetics/CrossoverPolicy.html" title="interface in org.apache.commons.math3.genetics">CrossoverPolicy</a></dd>
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<pre>public class <span class="strong">OrderedCrossover<T></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>
implements <a href="../../../../../org/apache/commons/math3/genetics/CrossoverPolicy.html" title="interface in org.apache.commons.math3.genetics">CrossoverPolicy</a></pre>
<div class="block">Order 1 Crossover [OX1] builds offspring from <b>ordered</b> chromosomes by copying a
consecutive slice from one parent, and filling up the remaining genes from the other
parent as they appear.
<p>
This policy works by applying the following rules:
<ol>
<li>select a random slice of consecutive genes from parent 1</li>
<li>copy the slice to child 1 and mark out the genes in parent 2</li>
<li>starting from the right side of the slice, copy genes from parent 2 as they
appear to child 1 if they are not yet marked out.</li>
</ol>
<p>
Example (random sublist from index 3 to 7, underlined):
<pre>
p1 = (8 4 7 3 6 2 5 1 9 0) X c1 = (0 4 7 3 6 2 5 1 8 9)
--------- ---------
p2 = (0 1 2 3 4 5 6 7 8 9) X c2 = (8 1 2 3 4 5 6 7 9 0)
</pre>
<p>
This policy works only on <a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics"><code>AbstractListChromosome</code></a>, and therefore it
is parameterized by T. Moreover, the chromosomes must have same lengths.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>3.1</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="http://www.rubicite.com/Tutorials/GeneticAlgorithms/CrossoverOperators/Order1CrossoverOperator.aspx">
Order 1 Crossover Operator</a></dd></dl>
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<td class="colOne"><code><strong><a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html#OrderedCrossover()">OrderedCrossover</a></strong>()</code> </td>
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<td class="colFirst"><code><a href="../../../../../org/apache/commons/math3/genetics/ChromosomePair.html" title="class in org.apache.commons.math3.genetics">ChromosomePair</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html#crossover(org.apache.commons.math3.genetics.Chromosome,%20org.apache.commons.math3.genetics.Chromosome)">crossover</a></strong>(<a href="../../../../../org/apache/commons/math3/genetics/Chromosome.html" title="class in org.apache.commons.math3.genetics">Chromosome</a> first,
<a href="../../../../../org/apache/commons/math3/genetics/Chromosome.html" title="class in org.apache.commons.math3.genetics">Chromosome</a> second)</code>
<div class="block">Perform a crossover operation on the given chromosomes.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/commons/math3/genetics/ChromosomePair.html" title="class in org.apache.commons.math3.genetics">ChromosomePair</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html#mate(org.apache.commons.math3.genetics.AbstractListChromosome,%20org.apache.commons.math3.genetics.AbstractListChromosome)">mate</a></strong>(<a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics">AbstractListChromosome</a><<a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html" title="type parameter in OrderedCrossover">T</a>> first,
<a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics">AbstractListChromosome</a><<a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html" title="type parameter in OrderedCrossover">T</a>> second)</code>
<div class="block">Helper for <a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html#crossover(org.apache.commons.math3.genetics.Chromosome,%20org.apache.commons.math3.genetics.Chromosome)"><code>crossover(Chromosome, Chromosome)</code></a>.</div>
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<h4>OrderedCrossover</h4>
<pre>public OrderedCrossover()</pre>
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<h4>crossover</h4>
<pre>public <a href="../../../../../org/apache/commons/math3/genetics/ChromosomePair.html" title="class in org.apache.commons.math3.genetics">ChromosomePair</a> crossover(<a href="../../../../../org/apache/commons/math3/genetics/Chromosome.html" title="class in org.apache.commons.math3.genetics">Chromosome</a> first,
<a href="../../../../../org/apache/commons/math3/genetics/Chromosome.html" title="class in org.apache.commons.math3.genetics">Chromosome</a> second)
throws <a href="../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a>,
<a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre>
<div class="block">Perform a crossover operation on the given chromosomes.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/genetics/CrossoverPolicy.html#crossover(org.apache.commons.math3.genetics.Chromosome,%20org.apache.commons.math3.genetics.Chromosome)">crossover</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/genetics/CrossoverPolicy.html" title="interface in org.apache.commons.math3.genetics">CrossoverPolicy</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>first</code> - the first chromosome.</dd><dd><code>second</code> - the second chromosome.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the pair of new chromosomes that resulted from the crossover.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - iff one of the chromosomes is
not an instance of <a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics"><code>AbstractListChromosome</code></a></dd>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the length of the two chromosomes is different</dd></dl>
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<h4>mate</h4>
<pre>protected <a href="../../../../../org/apache/commons/math3/genetics/ChromosomePair.html" title="class in org.apache.commons.math3.genetics">ChromosomePair</a> mate(<a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics">AbstractListChromosome</a><<a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html" title="type parameter in OrderedCrossover">T</a>> first,
<a href="../../../../../org/apache/commons/math3/genetics/AbstractListChromosome.html" title="class in org.apache.commons.math3.genetics">AbstractListChromosome</a><<a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html" title="type parameter in OrderedCrossover">T</a>> second)
throws <a href="../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></pre>
<div class="block">Helper for <a href="../../../../../org/apache/commons/math3/genetics/OrderedCrossover.html#crossover(org.apache.commons.math3.genetics.Chromosome,%20org.apache.commons.math3.genetics.Chromosome)"><code>crossover(Chromosome, Chromosome)</code></a>. Performs the actual crossover.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>first</code> - the first chromosome</dd><dd><code>second</code> - the second chromosome</dd>
<dt><span class="strong">Returns:</span></dt><dd>the pair of new chromosomes that resulted from the crossover</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the length of the two chromosomes is different</dd></dl>
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