78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoStringMutation.h
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// (c) GeNeura Team, 1999
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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 _EOSTRINGMUTATION_H
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#define _EOSRTINGMUTATION_H
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#include <math.h>
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// EO includes
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#include <eoOp.h>
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#include <eoUniform.h>
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#include <eoMutation.h>
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/** Mutation of an eoString.
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The eoString's genes are changed by adding or substracting 1 to
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*/
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template <class EOT>
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class eoStringMutation: public eoMutation<EOT> {
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public:
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///
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eoStringMutation(const double _rate=0.0) : eoMutation< EOT >(_rate) {};
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///
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virtual ~eoStringMutation() {};
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/** @name Methods from eoObject
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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 "eoStringMutation";};
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//@}
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private:
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#ifdef _MSC_VER
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typedef EOT::Type Type;
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#else
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typedef typename EOT::Type Type;
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#endif
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/// applies operator to one gene in the EO. It increments or decrements the value of that gene by one.
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virtual void applyAt( EOT& _eo, unsigned _i ) const {
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eoUniform<double> uniform( 0, 1 );
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if( rate < uniform() ) {
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_eo.gene(_i) += ( uniform()>=0.5 )? (1) : (-1) ;
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}
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}
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};
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//-----------------------------------------------------------------------------
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#endif
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