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git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@1823 331e1502-861f-0410-8da2-ba01fb791d7f
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jhumeau 2010-05-26 15:18:59 +00:00
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trunk/paradiseo-moeo/src/scalarStuffs/distance/moeoWeightedChebychevDistance.h Normal file
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/*
* <moeoWeightedChebychevDistance.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
* (C) OPAC Team, LIFL, 2002-2007
*
* Jeremie Humeau
* Arnaud Liefooghe
* François Legillon
*
* 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
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and, more generally, to use and operate it in the
* same conditions as regards security.
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
* Contact: paradiseo-help@lists.gforge.inria.fr
*
*/
//-----------------------------------------------------------------------------
#ifndef MOEOCHEBYCHEVDIST_H_
#define MOEOCHEBYCHEVDIST_H_
#include <eo>
#include <moeo>
#include <cmath>
/**
* weighted chebychev distance
*/
template < class MOEOT>
class moeoWeightedChebychevDistance : public moeoObjSpaceDistance < MOEOT >
{
public:
typedef typename MOEOT::ObjectiveVector ObjectiveVector;
typedef typename MOEOT::Fitness Fitness;
/**
* constructor with a normalizer
* @param _rho
* @param _weight the weight to apply to each dimansion
* @param _normalizer the normalizer
*/
moeoWeightedChebychevDistance(unsigned int _rho, const ObjectiveVector& _weight, moeoObjectiveVectorNormalizer<MOEOT>& _normalizer): normalizer(_normalizer), weight(_weight), rho(_rho){}
/**
* constructor with a normalizer
* @param _rho
* @param _weight the weight to apply to each dimansion
*/
moeoWeightedChebychevDistance(unsigned int _rho, const ObjectiveVector& _weight): normalizer(defaultNormalizer), weight(_weight), rho(_rho){}
/**
* fonction which apply the metric to calculate a fitness
* @param _obj the point to evaluate
* @param _reference the reference to calculate the distance from
* @return the fitness conrresponding to the distance
*/
const Fitness operator()(const ObjectiveVector& _reference, const ObjectiveVector& _obj){
unsigned int dim=_obj.size();
Fitness res=0;
ObjectiveVector obj_norm=normalizer(_obj);
ObjectiveVector ref_norm=normalizer(_reference);
for (unsigned i=0;i<dim;i++){
res+=iteration(obj_norm,ref_norm,i);
}
return res;
}
private:
moeoObjectiveVectorNormalizer<MOEOT> &normalizer;
moeoObjectiveVectorNormalizer<MOEOT> defaultNormalizer;
const ObjectiveVector &weight;
double rho;
Fitness iteration(const ObjectiveVector &obj,const ObjectiveVector &reference,int dim){
Fitness res=abs(obj[dim]-reference[dim]);
res=weight[dim]*pow(res,rho);
res=pow(res,1/rho);
return res;
}
};
#endif