116 lines
2.5 KiB
C++
116 lines
2.5 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoMutation.h
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// (c) GeNeura Team, 1998
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//-----------------------------------------------------------------------------
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#ifndef _EOMUTATION_H
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#define _EOMUTATION_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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/** Generic Mutation of an EO.
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This is a virtual class, just to establish the interface
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*/
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template <class EOT>
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class eoMutation: public eoMonOp<EOT> {
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public:
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///
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eoMutation(const double _rate=0.0) : eoMonOp< EOT >(), rate(_rate) {};
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///
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virtual ~eoMutation() {};
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///
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virtual void operator()( EOT& _eo ) const {
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for ( unsigned i = 0; i < _eo.length(); i ++ )
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applyAt( _eo, i );
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}
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/// To print me on a stream.
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/// @param os The ostream.
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void printOn(ostream& os) const {
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os << rate ;
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}
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/// To read me from a stream.
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/// @param is The istream.
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void readFrom(istream& is) {
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is >> rate ;
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}
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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 "eoMutation";};
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//@}
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protected:
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double rate;
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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 is empty, so each descent class must define it.
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virtual void applyAt( EOT& _eo, unsigned _i ) const = 0 ;
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};
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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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