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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@177 331e1502-861f-0410-8da2-ba01fb791d7f

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legrand 2007-02-06 13:11:53 +00:00
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
//-----------------------------------------------------------------------------
// moeoSelectOneFormPopAndArch.h
// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
/*
This library...
Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
*/
//-----------------------------------------------------------------------------
#ifndef MOEOSELECTONEFROMPOPANDARCH_H_
#define MOEOSELECTONEFROMPOPANDARCH_H_
#include <eoPop.h>
#include <utils/eoRNG.h>
#include <moeoArchive.h>
#include <moeoSelectOne.h>
#include <moeoRandomSelectOne.h>
/**
* Elitist selection process that consists in choosing individuals in the archive as well as in the current population.
*/
template<class EOT>
class moeoSelectOneFromPopAndArch : public moeoSelectOne<EOT>
{
public:
/**
* Ctor
* @param _popSelectOne the population's selection operator
* @param _archSelectOne the archive's selection operator
* @param _arch the archive
* @param _ratioFromPop the ratio of selected individuals from the population
*/
moeoSelectOneFromPopAndArch (moeoSelectOne<EOT> & _popSelectOne, moeoSelectOne<EOT> _archSelectOne, moeoArchive <EOT> & _arch, double _ratioFromPop=0.5)
: popSelectOne(_popSelectOne), archSelectOne(_archSelectOne), arch(_arch), ratioFromPop(_ratioFromPop)
{}
/**
* Ctor - the archive's selection operator is a random selector
* @param _popSelectOne the population's selection operator
* @param _arch the archive
* @param _ratioFromPop the ratio of selected individuals from the population
*/
moeoSelectOneFromPopAndArch (moeoSelectOne<EOT> & _popSelectOne, moeoArchive <EOT> & _arch, double _ratioFromPop=0.5)
: popSelectOne(_popSelectOne), archSelectOne(randomSelectOne), arch(_arch), ratioFromPop(_ratioFromPop)
{}
/**
* The selection process
*/
virtual const EOT & operator () (const eoPop<EOT> & pop) {
if (arch.size() > 0)
if (rng.flip(ratioFromPop))
return popSelectOne(pop);
else
return archSelectOne(arch);
else
return popSelectOne(pop);
}
/**
* Setups some population stats
*/
virtual void setup (const eoPop<EOT> & _pop) {
popSelectOne.setup(_pop);
}
private:
/** The population's selection operator */
moeoSelectOne<EOT> & popSelectOne;
/** The archive's selection operator */
moeoSelectOne<EOT> & archSelectOne;
/** The archive */
moeoArchive <EOT> & arch;
/** The ratio of selected individuals from the population*/
double ratioFromPop;
/** A random selection operator */
moeoRandomSelectOne<EOT> randomSelectOne;
};
#endif /*MOEOSELECTONEFROMPOPANDARCH_H_*/