110 lines
3 KiB
C++
110 lines
3 KiB
C++
/*
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The Evolving Distribution Objects framework (EDO) is a template-based,
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ANSI-C++ evolutionary computation library which helps you to write your
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own estimation of distribution algorithms.
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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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Copyright (C) 2011 Thales group
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*/
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/*
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Authors:
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Johann Dréo <johann.dreo@thalesgroup.com>
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Pierre Savéant <pierre.saveant@thalesgroup.com>
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*/
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#ifndef _edoRepairerRound_h
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#define _edoRepairerRound_h
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#include <cmath>
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#include "edoRepairerApply.h"
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/** A repairer that calls "floor" on each items of a solution
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*
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* Just a proxy to "edoRepairerApplyUnary<EOT, EOT::AtomType(EOT::AtomType)> rep( std::floor);"
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*
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* @ingroup Repairers
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*/
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template < typename EOT >
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class edoRepairerFloor : public edoRepairerApplyUnary<EOT>
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{
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public:
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edoRepairerFloor() : edoRepairerApplyUnary<EOT>( std::floor ) {}
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};
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/** A repairer that calls "ceil" on each items of a solution
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*
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* @see edoRepairerFloor
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*
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* @ingroup Repairers
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*/
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template < typename EOT >
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class edoRepairerCeil : public edoRepairerApplyUnary<EOT>
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{
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public:
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edoRepairerCeil() : edoRepairerApplyUnary<EOT>( std::ceil ) {}
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};
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// FIXME find a way to put this function as a member of edoRepairerRoundDecimals
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template< typename ArgType >
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ArgType edoRound( ArgType val, ArgType prec = 1.0 )
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{
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return (val > 0.0) ?
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floor(val * prec + 0.5) / prec :
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ceil(val * prec - 0.5) / prec ;
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}
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/** A repairer that round values at a given a precision.
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*
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* e.g. if prec=0.1, 8.06 will be rounded to 8.1
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*
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* @see edoRepairerFloor
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* @see edoRepairerCeil
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*
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* @ingroup Repairers
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*/
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template < typename EOT >
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class edoRepairerRoundDecimals : public edoRepairerApplyBinary<EOT>
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{
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public:
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typedef typename EOT::AtomType ArgType;
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//! Generally speaking, we expect decimals being <= 1, but it can work for higher values
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edoRepairerRoundDecimals( ArgType decimals ) : edoRepairerApplyBinary<EOT>( edoRound<ArgType>, 1 / decimals )
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{
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assert( decimals <= 1.0 );
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assert( 1/decimals >= 1.0 );
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}
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};
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/** A repairer that do a rounding around val+0.5
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*
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* @see edoRepairerRoundDecimals
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*
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* @ingroup Repairers
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*/
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template < typename EOT >
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class edoRepairerRound : public edoRepairerRoundDecimals<EOT>
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{
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public:
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edoRepairerRound() : edoRepairerRoundDecimals<EOT>( 1.0 ) {}
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};
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#endif // !_edoRepairerRound_h
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