moeoContributionMetric.h

/* 
* <moeoContributionMetric.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
* (C) OPAC Team, LIFL, 2002-2007
*
* Sebastien Cahon, Arnaud Liefooghe
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software.  You can  use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and  rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty  and the software's author,  the holder of the
* economic rights,  and the successive licensors  have only  limited liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading,  using,  modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean  that it is complicated to manipulate,  and  that  also
* therefore means  that it is reserved for developers  and  experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
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*
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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*/
//-----------------------------------------------------------------------------

#ifndef MOEOCONTRIBUTIONMETRIC_H_
#define MOEOCONTRIBUTIONMETRIC_H_

#include <comparator/moeoParetoObjectiveVectorComparator.h>
#include <metric/moeoMetric.h>

template < class ObjectiveVector >
class moeoContributionMetric : public moeoVectorVsVectorBinaryMetric < ObjectiveVector, double >
{
public:

    double operator()(const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2) {
        unsigned int c  = card_C(_set1, _set2);
        unsigned int w1 = card_W(_set1, _set2);
        unsigned int n1 = card_N(_set1, _set2);
        unsigned int w2 = card_W(_set2, _set1);
        unsigned int n2 = card_N(_set2, _set1);
        return (double) (c / 2.0 + w1 + n1) / (c + w1 + n1 + w2 + n2);
    }


private:

    moeoParetoObjectiveVectorComparator < ObjectiveVector > paretoComparator;
    
    
    unsigned int card_C (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2) {
        unsigned int c=0;
        for (unsigned int i=0; i<_set1.size(); i++)
            for (unsigned int j=0; j<_set2.size(); j++)
                if (_set1[i] == _set2[j]) {
                    c++;
                    break;
                }
        return c;
    }


    unsigned int card_W (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2) {
        unsigned int w=0;
        for (unsigned int i=0; i<_set1.size(); i++)
            for (unsigned int j=0; j<_set2.size(); j++)
                if (paretoComparator(_set2[j], _set1[i]))
                {
                    w++;
                    break;
                }
        return w;
    }


    unsigned int card_N (const std::vector < ObjectiveVector > & _set1, const std::vector < ObjectiveVector > & _set2) {
        unsigned int n=0;
        for (unsigned int i=0; i<_set1.size(); i++) {
            bool domin_rel = false;
            for (unsigned int j=0; j<_set2.size(); j++)
                if ( (paretoComparator(_set2[j], _set1[i])) || (paretoComparator(_set1[i], _set2[j])) )
                {
                    domin_rel = true;
                    break;
                }
            if (! domin_rel)
                n++;
        }
        return n;
    }

};

#endif /*MOEOCONTRIBUTIONMETRIC_H_*/

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