138 lines
5 KiB
C++
138 lines
5 KiB
C++
/*
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* <moeoContributionMetric.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 MOEOCONTRIBUTIONMETRIC_H_
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#define MOEOCONTRIBUTIONMETRIC_H_
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#include <comparator/moeoParetoObjectiveVectorComparator.h>
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#include <metric/moeoMetric.h>
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/**
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* The contribution metric evaluates the proportion of non-dominated solutions given by a Pareto set relatively to another Pareto set
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* (Meunier, Talbi, Reininger: 'A multiobjective genetic algorithm for radio network optimization', in Proc. of the 2000 Congress on Evolutionary Computation, IEEE Press, pp. 317-324)
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*/
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template < class ObjectiveVector >
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class moeoContributionMetric : public moeoVectorVsVectorBinaryMetric < ObjectiveVector, double >
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{
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public:
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/**
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* Returns the contribution of the Pareto set '_set1' relatively to the Pareto set '_set2'
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* @param _set1 the first Pareto set
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* @param _set2 the second Pareto set
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*/
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double operator()(const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2)
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{
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unsigned int c = card_C(_set1, _set2);
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unsigned int w1 = card_W(_set1, _set2);
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unsigned int n1 = card_N(_set1, _set2);
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unsigned int w2 = card_W(_set2, _set1);
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unsigned int n2 = card_N(_set2, _set1);
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return (double) (c / 2.0 + w1 + n1) / (c + w1 + n1 + w2 + n2);
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}
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private:
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/** Functor to compare two objective vectors according to Pareto dominance relation */
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moeoParetoObjectiveVectorComparator < ObjectiveVector > paretoComparator;
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/**
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* Returns the number of solutions both in '_set1' and '_set2'
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* @param _set1 the first Pareto set
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* @param _set2 the second Pareto set
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*/
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unsigned int card_C (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2)
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{
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unsigned int c=0;
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for (unsigned int i=0; i<_set1.size(); i++)
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for (unsigned int j=0; j<_set2.size(); j++)
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if (_set1[i] == _set2[j])
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{
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c++;
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break;
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}
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return c;
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}
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/**
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* Returns the number of solutions in '_set1' dominating at least one solution of '_set2'
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* @param _set1 the first Pareto set
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* @param _set2 the second Pareto set
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*/
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unsigned int card_W (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2)
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{
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unsigned int w=0;
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for (unsigned int i=0; i<_set1.size(); i++)
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for (unsigned int j=0; j<_set2.size(); j++)
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if (paretoComparator(_set2[j], _set1[i]))
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{
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w++;
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break;
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}
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return w;
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}
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/**
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* Returns the number of solutions in '_set1' having no relation of dominance with those from '_set2'
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* @param _set1 the first Pareto set
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* @param _set2 the second Pareto set
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*/
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unsigned int card_N (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2)
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{
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unsigned int n=0;
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for (unsigned int i=0; i<_set1.size(); i++)
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{
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bool domin_rel = false;
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for (unsigned int j=0; j<_set2.size(); j++)
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if ( (paretoComparator(_set2[j], _set1[i])) || (paretoComparator(_set1[i], _set2[j])) )
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{
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domin_rel = true;
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break;
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}
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if (! domin_rel)
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n++;
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}
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return n;
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}
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};
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#endif /*MOEOCONTRIBUTIONMETRIC_H_*/
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