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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@267 331e1502-861f-0410-8da2-ba01fb791d7f
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liefooga 2007-04-17 15:53:56 +00:00
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trunk/paradiseo-moeo/src/moeoStochTournamentSelect.h Normal file
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
//-----------------------------------------------------------------------------
// moeoStochTournamentSelect.h
// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
/*
This library...
Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
*/
//-----------------------------------------------------------------------------
#ifndef MOEOSTOCHTOURNAMENTSELECT_H_
#define MOEOSTOCHTOURNAMENTSELECT_H_
#include <moeoSelectOne.h>
#include <moeoSelectors.h>
/**
* Selection strategy that selects ONE individual by stochastic tournament.
*/
template < class MOEOT > class moeoStochTournamentSelect:public moeoSelectOne <MOEOT>
{
public:
/**
* Full Ctor
* @param _comparator the comparator (used to compare 2 individuals)
* @param _tRate the tournament rate
*/
moeoStochTournamentSelect (moeoComparator < MOEOT > & _comparator, double _tRate = 1.0) :
comparator (_comparator), tRate (_tRate)
{
// consistency checks
if (tRate < 0.5)
{
std::
cerr <<
"Warning, Tournament rate should be > 0.5\nAdjusted to 0.55\n";
tRate = 0.55;
}
if (tRate > 1)
{
std::
cerr << "Warning, Tournament rate should be < 1\nAdjusted to 1\n";
tRate = 1;
}
}
/**
* Ctor without comparator. A moeoFitnessThenDiversityComparator is used as default.
* @param _tRate the tournament rate
*/
moeoStochTournamentSelect (double _tRate = 1.0)
:comparator (*(new moeoFitnessThenDiversityComparator < MOEOT > ())), tRate (_tRate)
{
// consistency checks
if (tRate < 0.5)
{
std::
cerr <<
"Warning, Tournament rate should be > 0.5\nAdjusted to 0.55\n";
tRate = 0.55;
}
if (tRate > 1)
{
std::
cerr << "Warning, Tournament rate should be < 1\nAdjusted to 1\n";
tRate = 1;
}
}
/**
* Apply the tournament to the given population
* @param _pop the population
*/
const MOEOT & operator() (const eoPop < MOEOT > &_pop)
{
// use the selector
return mo_stochastic_tournament(_pop,tRate,comparator);
}
protected:
/** the diversity assignment strategy */
moeoComparator < MOEOT > & comparator;
/** the tournament rate */
double tRate;
};
#endif /*MOEOSTOCHTOURNAMENTSELECT_H_ */