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eo/tutorial/html/eoSGA.html
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eo/tutorial/html/eoSGA.html
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.75 [en] (X11; U; Linux 2.2.17-21mdk i686) [Netscape]">
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<title>eoSGA.h</title>
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</head>
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<body text="#000000" bgcolor="#C3C2B4" link="#0000EE" vlink="#551A8B" alink="#FF0000">
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<a href="eoLesson1.html">Back to Lesson 1</a> - <a href="eoTutorial.html">Tutorial
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main page </a>- <a href="eoTopDown.html">Algorithm-Based</a> - <a href="eoBottomUp.html">Component-Based
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page</a> - <a href="eoProgramming.html">Programming hints</a> - <font face="Arial,Helvetica"><a href="../../doc/html/index.html">EO
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documentation</a></font>
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<br>
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<hr WIDTH="100%"><!-- -------------- End of header ------------------ --><!-- ----------------------------------------------- -->
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<center>
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<h1>
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<font color="#FF0000">eoSGA.h</font></h1></center>
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<a NAME="start"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCC99" NOSAVE >
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<tr NOSAVE>
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<td NOSAVE><tt><font color="#993300">//-----------------------------------------------------------------------------</font></tt>
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<br><tt><font color="#993300">// eoSGA.h</font></tt>
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<br><tt><font color="#993300">//-----------------------------------------------------------------------------</font></tt>
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<br><b><tt><font color="#993300">#ifndef _eoSGA_h</font></tt></b>
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<br><b><tt><font color="#993300">#define _eoSGA_h</font></tt></b>
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<br><b><tt><font color="#993300">#include <eoOp.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoContinue.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoPop.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoSelectOne.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoSelectPerc.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoEvalFunc.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <eoAlgo.h></font></tt></b>
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<br><b><tt><font color="#993300">#include <apply.h></font></tt></b>
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<br><tt><font color="#993300">/** The Simple Genetic Algorithm, following
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Holland and Goldberg </font></tt>
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<br><tt><font color="#993300">* Needs a selector (class eoSelectOne)
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a crossover (eoQuadratic, </font></tt>
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<br><tt><font color="#993300">* i.e. a 2->2
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operator) and a mutation with their respective rates, </font></tt>
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<br><tt><font color="#993300">* of course
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an evaluation function (eoEvalFunc) and a continuator </font></tt>
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<br><tt><font color="#993300">* (eoContinue)
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which gives the stopping criterion. Performs full</font></tt>
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<br><tt><font color="#993300">* generational
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replacement.</font></tt>
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<br><tt><font color="#993300">*/ </font></tt>
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<br><b><tt><font color="#993300">template <class EOT></font></tt></b>
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<br><b><tt><font color="#993300">class eoSGA : public eoAlgo<EOT></font></tt></b>
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<br><b><tt><font color="#993300">{</font></tt></b>
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<br><b><tt><font color="#993300">public :</font></tt></b>
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<br><tt><font color="#993300"><b> </b>// added this second ctor as
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I didn't like the ordering of the parameters</font></tt>
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<br><tt><font color="#993300"><b> </b>// in the one above. Any objection
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:-) MS</font></tt>
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<br><a NAME="constructor"></a><b><tt><font color="#993300">eoSGA(</font></tt></b>
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<br><b><tt><font color="#993300"> eoSelectOne<EOT>&
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_select,</font></tt></b>
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<br><b><tt><font color="#993300"> eoQuadraticOp<EOT>&
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_cross, float _crate,</font></tt></b>
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<br><b><tt><font color="#993300"> eoMonOp<EOT>&
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_mutate, float _mrate,</font></tt></b>
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<br><b><tt><font color="#993300"> eoEvalFunc<EOT>&
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_eval,</font></tt></b>
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<br><b><tt><font color="#993300"> eoContinue<EOT>&
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_cont)</font></tt></b>
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<br><b><tt><font color="#993300"> : cont(_cont), </font></tt></b>
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<br><b><tt><font color="#993300"> mutate(_mutate), </font></tt></b>
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<br><b><tt><font color="#993300"> mutationRate(_mrate),</font></tt></b>
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<br><b><tt><font color="#993300"> cross(_cross),</font></tt></b>
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<br><b><tt><font color="#993300"> crossoverRate(_crate),</font></tt></b>
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<br><b><tt><font color="#993300"> select(_select),</font></tt></b>
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<br><b><tt><font color="#993300"> eval(_eval)
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{}</font></tt></b></td>
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</tr>
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</table>
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<a NAME="generation"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCC99" NOSAVE >
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<tr>
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<td><b><tt><font color="#FF6666"> void operator()(eoPop<EOT>&
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_pop)</font></tt></b>
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<br><b><tt><font color="#FF6666"> {</font></tt></b>
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<br><b><tt><font color="#FF6666"> eoPop<EOT> offspring;</font></tt></b>
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<br><b><tt><font color="#FF6666"> do {</font></tt></b>
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<br><b><tt><font color="#FF6666">
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select(_pop, offspring);</font></tt></b>
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<br><b><tt><font color="#FF6666">
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unsigned i;</font></tt></b>
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<br><b><tt><font color="#FF6666">
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for (i=0; i<_pop.size()/2; i++) </font></tt></b>
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<br><tt><font color="#FF6666"><b>
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{ </b>// generates 2 offspring from two parents</font></tt>
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<br><b><tt><font color="#FF6666">
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if ( rng.flip(crossoverRate) ) </font></tt></b>
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<br><b><tt><font color="#FF6666">
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{ </font></tt></b>
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<br><b><tt><font color="#FF6666">
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cross(offspring[2*i], offspring[2*i+1]);</font></tt></b>
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<br><b><tt><font color="#FF6666">
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}</font></tt></b>
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<br><b><tt><font color="#FF6666">
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}</font></tt></b>
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<br><b><tt><font color="#FF6666">
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for (i=0; i < _pop.size(); i++) </font></tt></b>
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<br><b><tt><font color="#FF6666">
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{</font></tt></b>
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<br><b><tt><font color="#FF6666">
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if (rng.flip(mutationRate) ) </font></tt></b>
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<br><b><tt><font color="#FF6666">
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{</font></tt></b>
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<br><b><tt><font color="#FF6666">
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mutate(offspring[i]);</font></tt></b>
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<br><b><tt><font color="#FF6666">
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}</font></tt></b>
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<br><b><tt><font color="#FF6666">
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}</font></tt></b>
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<br><b><tt><font color="#FF6666">
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_pop.swap(offspring);</font></tt></b>
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<br><b><tt><font color="#FF6666">
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apply<EOT>(eval, _pop);</font></tt></b>
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<br><b><tt><font color="#FF6666"> } while (cont(_pop));</font></tt></b>
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<br><b><tt><font color="#FF6666"> }</font></tt></b>
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<br> </td>
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</tr>
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</table>
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<a NAME="parametres"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#CCFFFF" NOSAVE >
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<tr>
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<td><b><tt><font color="#3366FF">private :</font></tt></b>
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<br><b><tt><font color="#3366FF"> eoContinue<EOT>& cont;</font></tt></b>
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<br><b><tt><font color="#3366FF"> eoMonOp<EOT>& mutate;</font></tt></b>
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<br><b><tt><font color="#3366FF"> float mutationRate;</font></tt></b>
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<br><b><tt><font color="#3366FF"> eoQuadraticOp<EOT>& cross;</font></tt></b>
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<br><b><tt><font color="#3366FF"> float crossoverRate;</font></tt></b>
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<br><b><tt><font color="#3366FF"> eoSelectPerc<EOT> select;</font></tt></b>
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<br><b><tt><font color="#3366FF"> eoEvalFunc<EOT>& eval;</font></tt></b></td>
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</tr>
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</table>
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<a NAME="general"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCC99" NOSAVE >
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<tr>
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<td><b><tt><font color="#993300">};</font></tt></b>
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<br><b><tt><font color="#993300">#endif</font></tt></b></td>
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</tr>
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</table>
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<hr WIDTH="100%"><a href="eoLesson1.html">Back to Lesson 1</a> - <a href="eoTutorial.html">Tutorial
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main page </a>- <a href="eoTopDown.html">Algorithm-Based</a> - <a href="eoBottomUp.html">Component-Based
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page</a> - <a href="eoProgramming.html">Programming hints</a> - <font face="Arial,Helvetica"><a href="../../doc/html/index.html">EO
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documentation</a></font>
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<hr>
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<address>
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<a href="mailto:Marc.Schoenauer@inria.fr">Marc Schoenauer</a></address>
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<br><!-- Created: Nov 2000 --><!-- hhmts start -->Last modified: Sun Nov
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19 19:36:21 2000<!-- hhmts end -->
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</body>
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</html>
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