7c219dbd48
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@381 331e1502-861f-0410-8da2-ba01fb791d7f
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// moeoStochTournamentSelect.h
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// (c) OPAC Team (LIFL), Dolphin Project (INRIA), 2007
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/*
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This library...
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Contact: paradiseo-help@lists.gforge.inria.fr, http://paradiseo.gforge.inria.fr
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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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