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<title>FirstRealEA.cpp</title>
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<a href="eoLesson2.html">Back to Lesson 2</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 WIDTH="100%"><!-- -------------- End of header ------------------ --><!-- ----------------------------------------------- -->
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<center>
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<h1>
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<font color="#FF0000">FirstRealEA.cpp</font></h1></center>
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Click on the figure to see the corresponding code.
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<br>In the code, the <a href="eoTutorial.html#colors">colors are meaningfull</a>
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<br>The actual code is in boldface and the comment in normal face.
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<br><img SRC="EA_tutorial.jpg" USEMAP="#Map" ><map NAME="Map"><!-- Init --><area SHAPE="rect" HREF="#init" COORDS="14,31,135,70"><area SHAPE="rect" HREF="#eval" COORDS="14,110,135,150"><!-- main loop --><area SHAPE="rect" HREF="#representation" COORDS="170,110,295,150"><area SHAPE="rect" HREF="#output" COORDS="280,45,480,70"><area SHAPE="rect" HREF="#stop" COORDS="348,110,430,150"><area SHAPE="rect" HREF="#select" COORDS="495,110,615,150"><area SHAPE="rect" HREF="#representation" COORDS="495,190,615,230"><area SHAPE="rect" HREF="#crossover" COORDS="495,265,625,287"><area SHAPE="rect" HREF="#mutation" COORDS="495,287,625,305"><area SHAPE="rect" HREF="#representation" COORDS="240,270,465,310"><area SHAPE="rect" HREF="#eval" COORDS="170,270,295,310"><area SHAPE="rect" HREF="#replace" COORDS="170,190,295,230"><!-- Center of loop --><area SHAPE="rect" HREF="#generation" COORDS="310,160,485,260"><!-- 4 bottom lines --><area SHAPE="rect" HREF="#operators" COORDS="15,350,260,370"><area SHAPE="rect" HREF="#representation" COORDS="270,350,460,370"><area SHAPE="rect" HREF="#engine" COORDS="15,377,400,397"><area SHAPE="rect" HREF="#eval" COORDS="15,403,230,423"><area SHAPE="rect" HREF="#checkpoint" COORDS="15,430,221,450"><area SHAPE="rect" HREF="#stop" COORDS="221,430,345,450"><area SHAPE="rect" HREF="#stat" COORDS="375,430,445,450"><area SHAPE="rect" HREF="#parametres" COORDS="0,358,278,378"></map>
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<br><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">// FirstRealEA.cpp</font></tt>
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<br><tt><font color="#993300">//-----------------------------------------------------------------------------</font></tt>
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<br><tt><font color="#993300">//*</font></tt>
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<br><tt><font color="#993300">// Still an instance of a VERY simple Real-coded
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Genetic Algorithm </font></tt>
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<br><tt><font color="#993300">// (see FirstBitGA.cpp) but now with
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Breeder - and Combined Ops</font></tt>
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<br><tt><font color="#993300">//</font></tt>
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<br><tt><font color="#993300">//-----------------------------------------------------------------------------</font></tt>
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<br><tt><font color="#993300">// standard includes</font></tt>
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<br><tt><font color="#993300"><b>#include <stdexcept> </b>// runtime_error </font></tt>
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<br><tt><font color="#993300"><b>#include <iostream>
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</b>// cout</font></tt>
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<br><tt><font color="#993300"><b>#include <strstream> </b>// ostrstream,
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istrstream</font></tt>
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<br><tt><font color="#993300">// the general include for eo</font></tt>
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<br><b><tt><font color="#993300">#include <eo></font></tt></b></td>
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</tr>
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</table>
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<a NAME="representation"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFFFCC" NOSAVE >
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<tr>
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<td><tt><font color="#999900"><b>#include <es.h></b></font></tt><br>
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<tt><font color="#999900">//-----------------------------------------------------------------------------</font></tt>
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<br><tt><font color="#999900">// define your individuals</font></tt>
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<br><b><tt><font color="#999900">typedef eoReal<double> Indi; </font></tt></b></td>
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</tr>
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</table>
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<a NAME="evalfunc"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCCC" NOSAVE >
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<tr>
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<td><tt><font color="#CC0000">//-----------------------------------------------------------------------------</font></tt>
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<br><tt><font color="#CC0000">// a simple fitness function that computes
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the euclidian norm of a real vector</font></tt>
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<br><tt><font color="#CC0000">// Now in a separate file, and declared as
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binary_value(const vector<bool> &)</font></tt>
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<br><b><tt><font color="#CC0000">#include "real_value.h"</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><tt><font color="#993300">//-----------------------------------------------------------------------------</font></tt>
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<br><b><tt><font color="#993300">void main_function(int argc, char **argv)</font></tt></b>
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<br><b><tt><font color="#993300">{</font></tt></b></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><tt><font color="#3366FF"><b> const unsigned int SEED = 42; </b>//
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seed for random number generator</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int T_SIZE = 3; </b>//
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size for tournament selection</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int VEC_SIZE = 8;
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</b>// Number of object variables in genotypes</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int POP_SIZE = 20;
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</b>// Size of population</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int MAX_GEN = 500;
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</b>// Maximum number of generation before STOP</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int MIN_GEN = 10;
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</b>// Minimum number of generation before ...</font></tt>
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<br><tt><font color="#3366FF"><b> const unsigned int STEADY_GEN =
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50; </b>// stop after STEADY_GEN gen. without improvelent</font></tt>
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<br><tt><font color="#3366FF"><b> const float P_CROSS = 0.8; </b>//
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Crossover probability</font></tt>
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<br><tt><font color="#3366FF"><b> const float P_MUT = 0.5; </b>//
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mutation probability</font></tt>
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<br><tt><font color="#3366FF"><b> const double EPSILON = 0.01; </b>//
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range for real uniform mutation</font></tt>
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<br><tt><font color="#3366FF"> <b>double
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SIGMA = 0.3; </b> // std dev.
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for normal mutation</font></tt>
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<br><tt><font color="#3366FF"><b> </b>// some parameters for chosing
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among different operators</font></tt>
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<br><tt><font color="#3366FF"><b> const double hypercubeRate = 0.5;
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</b>// relative weight for hypercube Xover</font></tt>
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<br><tt><font color="#3366FF"><b> const double segmentRate = 0.5;
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</b>// relative weight for segment Xover</font></tt>
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<br><tt><font color="#3366FF"><b> const double uniformMutRate = 0.5;
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</b>// relative weight for uniform mutation</font></tt>
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<br><tt><font color="#3366FF"><b> const double detMutRate = 0.5;
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</b>// relative weight for det-uniform mutation</font></tt>
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<br><tt><font color="#3366FF"> <b>const double normalMutRate = 0.5;</b>
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// relative weight for normal mutation</font></tt></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><tt><font color="#993300"><b> </b>//////////////////////////</font></tt>
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<br><tt><font color="#993300"><b> </b>// Random seed</font></tt>
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<br><tt><font color="#993300"><b> </b>//////////////////////////</font></tt>
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<br><tt><font color="#993300"><b> </b>//reproducible random seed:
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if you don't change SEED above, </font></tt>
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<br><tt><font color="#993300"><b> </b>// you'll aways get the same
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result, NOT a random run</font></tt>
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<br><b><tt><font color="#993300"> rng.reseed(SEED);</font></tt></b></td>
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</tr>
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</table>
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<a NAME="eval"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCCC" NOSAVE >
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<tr>
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<td><tt><font color="#CC0000"><b> </b>/////////////////////////////</font></tt>
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<br><tt><font color="#CC0000"><b> </b>// Fitness function</font></tt>
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<br><tt><font color="#CC0000"><b> </b>////////////////////////////</font></tt>
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<br><tt><font color="#CC0000"><b> </b>// Evaluation: from a plain
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C++ fn to an EvalFunc Object</font></tt>
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<br><tt><font color="#CC0000"><b> </b>// you need to give the full
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description of the function</font></tt>
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<br><b><tt><font color="#CC0000"> eoEvalFuncPtr<Indi, double, const
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vector<double>& > eval( real_value );</font></tt></b></td>
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</tr>
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</table>
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<a NAME="init"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCFF" NOSAVE >
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<tr>
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<td><tt><font color="#993399"><b> </b>////////////////////////////////</font></tt>
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<br><tt><font color="#993399"><b> </b>// Initilisation of population</font></tt>
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<br><tt><font color="#993399"><b> </b>////////////////////////////////</font></tt>
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<br><tt><font color="#993399"><b> </b>// based on a uniform generator</font></tt>
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<br><b><tt><font color="#993399"> eoInitFixedLength<Indi, uniform_generator<double>
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></font></tt></b>
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<br><b><tt><font color="#993399">
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random(VEC_SIZE, uniform_generator<double>(-1.0, 1.0));</font></tt></b>
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<br><tt><font color="#993399"><b> </b>// Initialization of
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the population</font></tt>
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<br><b><tt><font color="#993399"> eoPop<Indi> pop(POP_SIZE, random);</font></tt></b>
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<p><tt><font color="#993399"><b> </b>// and evaluate it in one loop</font></tt>
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<br><tt><font color="#993399"><b> apply<Indi>(eval, pop); </b>//
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STL syntax</font></tt></td>
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</tr>
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</table>
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<a NAME="output"></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><tt><font color="#3366FF"><b> </b>// sort pop before printing
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it!</font></tt>
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<br><b><tt><font color="#3366FF"> pop.sort();</font></tt></b>
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<br><tt><font color="#3366FF"><b> </b>// Print (sorted) intial population
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(raw printout)</font></tt>
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<br><b><tt><font color="#3366FF"> cout << "Initial Population"
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<< endl;</font></tt></b>
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<br><b><tt><font color="#3366FF"> cout << pop;</font></tt></b></td>
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</tr>
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</table>
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<a NAME="engine"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#99FFCC" NOSAVE >
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<tr>
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<td><tt><font color="#009900"><b> </b>/////////////////////////////////////</font></tt>
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<br><tt><font color="#009900"><b> </b>// selection and replacement</font></tt>
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<br><tt><font color="#009900"><b> </b>////////////////////////////////////</font></tt></td>
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</tr>
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</table>
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<a NAME="select"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#99FFCC" NOSAVE >
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<tr>
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<td><tt><font color="#009900"><b> </b>// The robust tournament selection</font></tt>
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<br><b><tt><font color="#009900"> eoDetTournamentSelect<Indi> selectOne(T_SIZE);</font></tt></b>
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<br><a NAME="select_encapsulate"></a><tt><font color="#009900"><b> </b>//
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is now encapsulated in a eoSelectPerc (entage)</font></tt>
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<br><tt><font color="#009900"><b> eoSelectPerc<Indi> select(selectOne);</b>//
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by default rate==1</font></tt></td>
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</tr>
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</table>
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<a NAME="replace"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#99FFCC" NOSAVE >
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<tr>
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<td><tt><font color="#009900"><b> </b>// And we now have the full
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slection/replacement - though with </font></tt>
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<br><tt><font color="#009900"><b> </b>// no replacement (== generational
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replacement) at the moment :-)</font></tt>
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<br><b><tt><font color="#009900"> eoNoReplacement<Indi> replace; </font></tt></b></td>
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</tr>
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</table>
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<a NAME="operators"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCFF" NOSAVE >
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<tr>
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<td><tt><font color="#993399"><b> </b>//////////////////////////////////////</font></tt>
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<br><tt><font color="#993399"><b> </b>// The variation operators</font></tt>
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<br><tt><font color="#993399"><b> </b>//////////////////////////////////////</font></tt></td>
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</tr>
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</table>
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<a NAME="crossover"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCFF" NOSAVE >
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<tr>
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<td><tt><font color="#993399"><b> </b>// uniform chooce on segment
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made by the parents</font></tt>
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<br><b><tt><font color="#993399"> eoSegmentCrossover<Indi> xoverS;</font></tt></b>
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<br><tt><font color="#993399"><b> </b>// uniform choice in hypercube
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built by the parents</font></tt>
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<br><b><tt><font color="#993399"> eoHypercubeCrossover<Indi> xoverA;</font></tt></b>
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<br><tt><font color="#993399"><b> </b>// Combine them with relative
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weights</font></tt>
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<br><b><tt><font color="#993399"> eoPropCombinedQuadOp<Indi> xover(xoverS,
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segmentRate);</font></tt></b>
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<br><b><tt><font color="#993399"> xover.add(xoverA, hypercubeRate,
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true);</font></tt></b></td>
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</tr>
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</table>
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<a NAME="mutation"></a>
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<table BORDER=0 CELLSPACING=0 COLS=1 WIDTH="100%" BGCOLOR="#FFCCFF" NOSAVE >
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<tr>
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<td>
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<br><tt><font color="#993399"><b> </b>// offspring(i) uniformly chosen
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in [parent(i)-epsilon, parent(i)+epsilon]</font></tt>
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<br><b><tt><font color="#993399"> eoUniformMutation<Indi>
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mutationU(EPSILON); </font></tt></b>
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<br><tt><font color="#993399"><b> </b>// k (=1) coordinates of parents
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are uniformly modified</font></tt>
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<br><b><tt><font color="#993399"> eoDetUniformMutation<Indi>
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mutationD(EPSILON); </font></tt></b>
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<br><tt><font color="#993399"> // all coordinates of parents are normally
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modified (stDev SIGMA)</font></tt>
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<br><b><tt><font color="#993399"> eoNormalMutation<Indi>
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mutationN(SIGMA); </font></tt></b>
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<br><tt><font color="#993399"><b> </b>// Combine them with relative
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weights</font></tt>
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<br><b><tt><font color="#993399"> eoPropCombinedMonOp<Indi> mutation(mutationU,
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uniformMutRate);</font></tt></b>
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<br><b><tt><font color="#993399"> mutation.add(mutationD, detMutRate);</font></tt></b>
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<br><b><tt><font color="#993399"> mutation.add(mutationN, normalMutRate,
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true);</font></tt></b>
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<p><tt><font color="#993399"><b> </b>// The operators are encapsulated
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into an eoTRansform object</font></tt>
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<br><b><tt><font color="#993399"> eoSGATransform<Indi> transform(xover,
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P_CROSS, mutation, P_MUT);</font></tt></b></td>
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</tr>
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</table>
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<a NAME="stop"></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></td>
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</tr>
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</table>
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<a NAME="checkpoint"></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><tt><font color="#3366FF"><b> </b>//////////////////////////////////////</font></tt>
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<br><tt><font color="#3366FF"><b> </b>// termination conditions: use
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more than one</font></tt>
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<br><tt><font color="#3366FF"><b> </b>/////////////////////////////////////</font></tt>
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<br><tt><font color="#3366FF"><b> </b>// stop after MAX_GEN generations</font></tt>
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<br><b><tt><font color="#3366FF"> eoGenContinue<Indi> genCont(MAX_GEN);</font></tt></b>
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<br><tt><font color="#3366FF"><b> </b>// do MIN_GEN gen., then stop
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after STEADY_GEN gen. without improvement</font></tt>
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<br><b><tt><font color="#3366FF"> eoSteadyFitContinue<Indi> steadyCont(MIN_GEN,
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STEADY_GEN);</font></tt></b>
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<br><tt><font color="#3366FF"><b> </b>// stop when fitness reaches
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a target (here VEC_SIZE)</font></tt>
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<br><b><tt><font color="#3366FF"> eoFitContinue<Indi> fitCont(0);</font></tt></b>
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<br><tt><font color="#3366FF"><b> </b>// do stop when one of the above
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says so</font></tt>
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<br><b><tt><font color="#3366FF"> eoCombinedContinue<Indi> continuator(genCont);</font></tt></b>
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<br><b><tt><font color="#3366FF"> continuator.add(steadyCont);</font></tt></b>
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<br><b><tt><font color="#3366FF"> continuator.add(fitCont);</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><tt><font color="#FF6666"><b> </b>/////////////////////////////////////////</font></tt>
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<br><tt><font color="#FF6666"><b> </b>// the algorithm</font></tt>
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<br><tt><font color="#FF6666"><b> </b>////////////////////////////////////////</font></tt>
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<br><tt><font color="#FF6666"><b> </b>// Easy EA requires </font></tt>
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<br><tt><font color="#FF6666"><b> </b>// selection, transformation,
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eval, replacement, and stopping criterion</font></tt>
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<br><b><tt><font color="#FF6666"> eoEasyEA<Indi> gga(continuator,
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eval, select, transform, replace);</font></tt></b>
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<br><tt><font color="#FF6666"><b> </b>// Apply algo to pop - that's
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it!</font></tt>
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<br><b><tt><font color="#FF6666"> cout << "\n
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Here we go\n\n";</font></tt></b>
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<br><b><tt><font color="#FF6666"> gga(pop);</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="output"></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><tt><font color="#3366FF"><b> </b>// Print (sorted) intial population</font></tt>
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<br><b><tt><font color="#3366FF"> pop.sort();</font></tt></b>
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<br><b><tt><font color="#3366FF"> cout << "FINAL Population\n"
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<< pop << endl;</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><tt><font color="#993300">// A main that catches the exceptions</font></tt>
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<br><b><tt><font color="#993300">int main(int argc, char **argv)</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">#ifdef _MSC_VER</font></tt></b>
|
|
<br><tt><font color="#993300"><b> </b>// rng.reseed(42);</font></tt>
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|
<br><b><tt><font color="#993300"> int flag = _CrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);</font></tt></b>
|
|
<br><b><tt><font color="#993300"> flag
|
|
|= _CRTDBG_LEAK_CHECK_DF;</font></tt></b>
|
|
<br><b><tt><font color="#993300"> _CrtSetDbgFlag(flag);</font></tt></b>
|
|
<br><tt><font color="#993300">// _CrtSetBreakAlloc(100);</font></tt>
|
|
<br><b><tt><font color="#993300">#endif</font></tt></b>
|
|
<br><b><tt><font color="#993300"> try</font></tt></b>
|
|
<br><b><tt><font color="#993300"> {</font></tt></b>
|
|
<br><b><tt><font color="#993300">
|
|
main_function(argc, argv);</font></tt></b>
|
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<br><b><tt><font color="#993300"> }</font></tt></b>
|
|
<br><b><tt><font color="#993300"> catch(exception&
|
|
e)</font></tt></b>
|
|
<br><b><tt><font color="#993300"> {</font></tt></b>
|
|
<br><b><tt><font color="#993300">
|
|
cout << "Exception: " << e.what() << '\n';</font></tt></b>
|
|
<br><b><tt><font color="#993300"> }</font></tt></b>
|
|
<br><b><tt><font color="#993300"> return 1;</font></tt></b>
|
|
<br><b><tt><font color="#993300">}</font></tt></b></td>
|
|
</tr>
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|
</table>
|
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<hr WIDTH="100%"><a href="eoLesson2.html">Back to Lesson 2</a> - <a href="eoTutorial.html">Tutorial
|
|
main page </a>- <a href="eoTopDown.html">Algorithm-Based</a> - <a href="eoBottomUp.html">Component-Based
|
|
page</a> - <a href="eoProgramming.html">Programming hints</a> - <font face="Arial,Helvetica"><a href="../../doc/html/index.html">EO
|
|
documentation</a></font>
|
|
<hr>
|
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<address>
|
|
<a href="mailto:Marc.Schoenauer@inria.fr">Marc Schoenauer</a></address>
|
|
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<br><!-- Created: Nov 2000 --><!-- hhmts start -->Last modified: Wed Nov
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29 07:38:36 2000<!-- hhmts end -->
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</body>
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</html>
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