90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoUniformXOver.h
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// (c) GeNeura Team, 1998
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/*
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Contact: todos@geneura.ugr.es, http://geneura.ugr.es
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*/
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//-----------------------------------------------------------------------------
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#ifndef _EOUNIFORMXOVER_h
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#define _EOUNIFORMXOVER_h
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// for swap
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#if defined( __BORLANDC__ )
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#include <algorith>
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#else
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#include <algorithm>
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#endif
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// EO includes
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#include <eoOp.h>
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#include <eoUniform.h>
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//-----------------------------------------------------------------------------
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/**
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* EOUniformCrossover: operator for binary chromosomes
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* implementation of uniform crossover for EO
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* swaps ranges of bits between the parents
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*/
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//-----------------------------------------------------------------------------
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template<class EOT>
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class eoUniformXOver: public eoQuadraticOp< EOT >
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{
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public:
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///
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eoUniformXOver( float _rate = 0.5 ):
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eoQuadraticOp< EOT > ( ), rate( _rate ) {
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if (rate < 0 || rate > 1)
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runtime_error("UxOver --> invalid rate");
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}
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///
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void operator() ( EOT& chrom1, EOT& chrom2 ) const {
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unsigned end = min(chrom1.length(),chrom2.length()) - 1;
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// select bits to change
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eoUniform<float> rnd(0, 1);
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// aply changes
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for (unsigned bit = 0; bit < end; bit++)
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if (rnd() < rate)
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swap(chrom1[ bit], chrom2[ bit]);
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}
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/** @name Methods from eoObject
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readFrom and printOn are directly inherited from eoOp
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*/
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//@{
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/** Inherited from eoObject
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@see eoObject
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*/
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string className() const {return "eoUniformXOver";};
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//@}
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private:
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float rate; /// rate of uniform crossover
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};
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//-----------------------------------------------------------------------------
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#endif
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