113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
/*
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* Open BEAGLE
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* Copyright (C) 2001-2007 by Christian Gagne and Marc Parizeau
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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 2.1 of the License, or (at your option) any later version.
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*
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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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*
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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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*
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* Contact:
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* Laboratoire de Vision et Systemes Numeriques
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* Departement de genie electrique et de genie informatique
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* Universite Laval, Quebec, Canada, G1K 7P4
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* http://vision.gel.ulaval.ca
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*
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*/
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/*!
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* \file beagle/DecimateOp.hpp
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* \brief Definition of the class DecimateOp.
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* \author Christian Gagne
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* \author Marc Parizeau
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* $Revision: 1.6.2.1 $
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* $Date: 2007/05/09 01:51:10 $
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*/
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#ifndef Beagle_DecimateOp_hpp
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#define Beagle_DecimateOp_hpp
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#include <string>
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#include "beagle/config.hpp"
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#include "beagle/macros.hpp"
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#include "beagle/Object.hpp"
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#include "beagle/AbstractAllocT.hpp"
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#include "beagle/PointerT.hpp"
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#include "beagle/ContainerT.hpp"
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#include "beagle/Operator.hpp"
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#include "beagle/UInt.hpp"
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#include "beagle/String.hpp"
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#include "beagle/Individual.hpp"
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#include "beagle/Float.hpp"
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namespace Beagle {
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/*!
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* \class DecimateOp beagle/DecimateOp.hpp "beagle/DecimateOp.hpp"
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* \brief Population decimation operator class.
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* \ingroup ECF
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* \ingroup Op
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*
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* This operator shrinks the population size (i.e. it "decimates" the
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* population). The decimation is done by keeping the \em n best
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* individuals of the population, where \em n is \f$ratio \times
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* population size\f$ and \em ratio is the decimation ratio, which is
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* less than or equal to 1.0.
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*
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* The name of the decimation ratio defaults to
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* "ec.decimation.ratio".
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*
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* A special decimation ratio exists: -1.0. If this ratio is used
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* then the population will be reduced to the size specified in the
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* register variable "ec.pop.size". If the use of this special ratio
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* would result in an \em increase in the population size then an
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* exception is thrown.
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*
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* To increase the size of the population, consider
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* Beagle::OversizeOp.
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*
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*/
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class DecimateOp : public Operator {
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public:
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//! DecimateOp allocator type.
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typedef AllocatorT<DecimateOp,Operator::Alloc>
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Alloc;
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//! DecimateOp handle type.
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typedef PointerT<DecimateOp,Operator::Handle>
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Handle;
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//! DecimateOp bag type.
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typedef ContainerT<DecimateOp,Operator::Bag>
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Bag;
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explicit DecimateOp(string inDecimationRatioName="ec.decimation.ratio",
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string inName="DecimateOp");
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virtual ~DecimateOp() { }
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virtual void initialize(System& ioSystem);
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virtual void operate(Deme& ioDeme, Context& ioContext);
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protected:
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UIntArray::Handle mPopSize; //!< Population size for the evolution.
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Float::Handle mDecimationRatio; //!< Decimation ratio for the actual population.
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string mDecimationRatioName; //!< Decimation ratio parameter name.
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};
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}
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#endif // Beagle_DecimateOp_hpp
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