📄 glossary.geneticoperations.mutation.html
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Glossary of Genetic Programming Terms</td>
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<h1 class="dtH1" style="font-size: 85%; position: relative; left: 5px;">mutation Term</h1>
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<p> The change of a piece of code in a single <a href="Glossary.Objects.Individual.html">Individual</a> to another random piece of code.</p>
<H4 class="dtH4">Remarks</H4>
<P><strong>mutation</strong> is the primary method for maintaining genetic diversity in a <a href="Glossary.Objects.Population.html">Population</a>, though it can also be used to create new <a href="Glossary.Objects.Individual.html">Individual</a>s. Usually, an <strong>Individual</strong> is chosen with a relatively low probability, and then one of its nodes is changed randomly.</P>
<P>For example, given the <strong>Individual</strong> (with <strong>mutation</strong> point marked by the <strong><code>></code></strong> arrow):</P>
<pre class="code"> if( x() ) {
<strong>></strong> y();
z();
}</pre>
<P>If the random <strong>mutation</strong> node were <code>a</code>, the mutated <strong>Individual</strong> would be: </P>
<pre class="code"> if( x() ) {
a();
z();
}</pre>
<P>This operation is similar to biological mutation, except that mutations occur at a larger scale.</P>
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<h4 style="position: relative; top: -5px;">Design Note</h4>
<p>In this framework, the <strong>mutation</strong> operation is performed by the <a href="GeneticProgrammingEngine.ProblemSpace.Precode.IPrecodeTree.Mutate.html">Mutate</a> method of <a href="GeneticProgrammingEngine.ProblemSpace.Precode.IPrecodeTree.html">IPrecodeTree</a>. This method can be used during <a href="Glossary.GeneticOperations.breeding.html">breeding</a> to modify existing <a href="Glossary.Individual.html">Individual</a>s or to create new ones.</p>
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<h4 class="dtH4">See Also</h4>
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<a href="GeneticProgrammingEngine.ProblemSpace.Precode.IPrecodeTree.html">IPrecodeTree Interface</a> | <span id="design_span" class="show"><a href="GeneticProgrammingEngine.ProblemSpace.Precode.IPrecodeTree.Mutate.html">Mutate Method</a></span> | <a href="GeneticProgrammingEngine.ProblemSpace.Precode.IPrecodeTree.MutationPoints.html">MutationPoints Property</a></p>
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