116 lines
4 KiB
C++
116 lines
4 KiB
C++
/*
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* <moeoStochTournamentSelect.h>
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* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
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* (C) OPAC Team, LIFL, 2002-2007
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*
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* Arnaud Liefooghe
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*
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* This software is governed by the CeCILL license under French law and
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* abiding by the rules of distribution of free software. You can use,
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* modify and/ or redistribute the software under the terms of the CeCILL
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* license as circulated by CEA, CNRS and INRIA at the following URL
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* "http://www.cecill.info".
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*
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* As a counterpart to the access to the source code and rights to copy,
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* modify and redistribute granted by the license, users are provided only
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* with a limited warranty and the software's author, the holder of the
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* economic rights, and the successive licensors have only limited liability.
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*
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* In this respect, the user's attention is drawn to the risks associated
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* with loading, using, modifying and/or developing or reproducing the
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* software by the user in light of its specific status of free software,
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* that may mean that it is complicated to manipulate, and that also
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* therefore means that it is reserved for developers and experienced
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* professionals having in-depth computer knowledge. Users are therefore
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* encouraged to load and test the software's suitability as regards their
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* requirements in conditions enabling the security of their systems and/or
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* data to be ensured and, more generally, to use and operate it in the
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* same conditions as regards security.
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* The fact that you are presently reading this means that you have had
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* knowledge of the CeCILL license and that you accept its terms.
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*
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* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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* Contact: paradiseo-help@lists.gforge.inria.fr
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*
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*/
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//-----------------------------------------------------------------------------
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#ifndef MOEOSTOCHTOURNAMENTSELECT_H_
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#define MOEOSTOCHTOURNAMENTSELECT_H_
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#include <comparator/moeoComparator.h>
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#include <comparator/moeoFitnessThenDiversityComparator.h>
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#include <selection/moeoSelectOne.h>
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#include <selection/moeoSelectors.h>
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/**
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* Selection strategy that selects ONE individual by stochastic tournament.
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*/
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template < class MOEOT > class moeoStochTournamentSelect:public moeoSelectOne <MOEOT>
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{
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public:
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/**
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* Full Ctor
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* @param _comparator the comparator (used to compare 2 individuals)
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* @param _tRate the tournament rate
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*/
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moeoStochTournamentSelect (moeoComparator < MOEOT > & _comparator, double _tRate = 1.0) : comparator (_comparator), tRate (_tRate)
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{
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// consistency checks
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if (tRate < 0.5)
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{
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std::cerr << "Warning, Tournament rate should be > 0.5\nAdjusted to 0.55\n";
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tRate = 0.55;
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}
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if (tRate > 1)
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{
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std::cerr << "Warning, Tournament rate should be < 1\nAdjusted to 1\n";
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tRate = 1;
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}
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}
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/**
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* Ctor without comparator. A moeoFitnessThenDiversityComparator is used as default.
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* @param _tRate the tournament rate
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*/
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moeoStochTournamentSelect (double _tRate = 1.0) : comparator (defaultComparator), tRate (_tRate)
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{
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// consistency checks
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if (tRate < 0.5)
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{
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std::cerr << "Warning, Tournament rate should be > 0.5\nAdjusted to 0.55\n";
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tRate = 0.55;
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}
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if (tRate > 1)
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{
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std::cerr << "Warning, Tournament rate should be < 1\nAdjusted to 1\n";
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tRate = 1;
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}
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}
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/**
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* Apply the tournament to the given population
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* @param _pop the population
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*/
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const MOEOT & operator() (const eoPop < MOEOT > &_pop)
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{
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// use the selector
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return mo_stochastic_tournament(_pop,tRate,comparator);
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}
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protected:
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/** the comparator (used to compare 2 individuals) */
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moeoComparator < MOEOT > & comparator;
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/** a fitness then diversity comparator can be used as default */
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moeoFitnessThenDiversityComparator < MOEOT > defaultComparator;
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/** the tournament rate */
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double tRate;
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};
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#endif /*MOEOSTOCHTOURNAMENTSELECT_H_ */
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