129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
/*
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<bbRoyalRoadEval.h>
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Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010
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Sebastien Verel, Arnaud Liefooghe, Jeremie Humeau
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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 ue,
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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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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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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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#ifndef _bbRoyalRoadEval_h
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#define _bbRoyalRoadEval_h
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#include <eoEvalFunc.h>
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#include <vector>
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/**
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* Full evaluation Function for Building-Block Royal Road problem:
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* Richard A. Watson & Thomas Jansen, "A building-block royal road where crossover is provably essential", GECCO 07.
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*/
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template< class EOT >
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class BBRoyalRoadEval : public eoEvalFunc<EOT>
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{
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public:
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/**
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* Default constructor
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* @param _b number of blocks
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* @param _k size of a block
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*/
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BBRoyalRoadEval(unsigned int _b, unsigned int _k) : k(_k), b(_b) { }
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/**
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* add a target to sub-objective functions
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*
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* @param target target vector of boolean (of size k)
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* @param w weights of this target
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*/
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void addTarget(vector<bool> & target, double w) {
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targets.push_back(target);
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weights.push_back(w);
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}
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/**
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* Count the number of complete blocks in the bit string
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* @param _sol the solution to evaluate
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*/
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void operator() (EOT& _solution) {
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double sum = 0;
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unsigned int i, j, t;
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unsigned int offset;
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// Hamming distance
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double d;
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for(i = 0; i < b; i++) {
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offset = i * k;
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for(t = 0; t < targets.size(); t++) {
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d = 0;
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for(j = 0; j < k; j++)
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if (_solution[offset + j] != targets[t][j])
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d++;
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if (d == 0)
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sum += weights[t];
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else
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sum += 1.0 / ( 1.0 + d );
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}
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}
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_solution.fitness(sum);
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}
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/**
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* get the size of a block
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* @return block size
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*/
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unsigned int blockSize() {
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return k;
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}
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/**
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* get the number of blocks
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* @return the number of blocks
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*/
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unsigned int nbBlocks() {
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return b;
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}
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/**
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* get the targets
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* @return the vector of targets which is a boolean vector
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*/
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vector<vector<bool> > & getTargets() {
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return targets;
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}
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private:
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// number of blocks
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unsigned int b;
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// size of a block
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unsigned int k;
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vector<vector<bool> > targets;
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vector<double> weights;
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};
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#endif
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