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eo/src/es/make_op_real.h
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289
eo/src/es/make_op_real.h
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// make_op.h - the real-valued version
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// (c) Maarten Keijzer, Marc Schoenauer and GeNeura Team, 2001
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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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Marc.Schoenauer@polytechnique.fr
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mkeijzer@dhi.dk
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*/
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//-----------------------------------------------------------------------------
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#ifndef _make_op_h
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#define _make_op_h
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// the operators
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#include <eoOp.h>
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#include <eoGenOp.h>
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#include <eoCloneOps.h>
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#include <eoOpContainer.h>
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// combinations of simple eoOps (eoMonOp and eoQuadOp)
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#include <eoProportionalCombinedOp.h>
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// the specialized Real stuff
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#include <es/eoReal.h>
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#include <es/eoEsChromInit.h>
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#include <es/eoRealOp.h>
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#include <es/eoNormalMutation.h>
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// also need the parser and param includes
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#include <utils/eoParser.h>
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#include <utils/eoState.h>
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/** @addtogroup Builders
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* @{
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*/
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/*
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* This function builds the operators that will be applied to the eoReal
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*
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* It uses a parser (to get user parameters) and a state (to store the memory)
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* the last argument is an individual, needed for 2 reasons
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* it disambiguates the call after instanciations
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* some operator might need some private information about the indis
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*
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* This is why the template is the complete EOT even though only the fitness
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* is actually templatized here: the following only applies to bitstrings
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*
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* Note : the last parameter is an eoInit: if some operator needs some info
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* about the gneotypes, the init has it all (e.g. bounds, ...)
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* Simply do
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* EOT myEO;
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* _init(myEO);
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* and myEO is then an ACTUAL object
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*/
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template <class EOT>
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eoGenOp<EOT> & do_make_op(eoParser& _parser, eoState& _state, eoRealInitBounded<EOT>& _init)
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{
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// get std::vector size
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unsigned vecSize = _init.size();
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// First, decide whether the objective variables are bounded
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eoValueParam<eoRealVectorBounds>& boundsParam
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= _parser.getORcreateParam(eoRealVectorBounds(vecSize,eoDummyRealNoBounds), "objectBounds",
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"Bounds for variables", 'B', "Variation Operators");
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// this is a temporary version(!),
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// while Maarten codes the full tree-structured general operator input
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// BTW we must leave that simple version available somehow, as it is the one
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// that 90% people use!
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eoValueParam<std::string>& operatorParam
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= _parser.getORcreateParam(std::string("SGA"), "operator",
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"Description of the operator (SGA only now)",
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'o', "Variation Operators");
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if (operatorParam.value() != std::string("SGA"))
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throw std::runtime_error("Sorry, only SGA-like operator available right now\n");
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// now we read Pcross and Pmut,
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// the relative weights for all crossovers -> proportional choice
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// the relative weights for all mutations -> proportional choice
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// and create the eoGenOp that is exactly
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// crossover with pcross + mutation with pmut
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eoValueParam<double>& pCrossParam
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= _parser.getORcreateParam(0.6, "pCross",
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"Probability of Crossover",
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'C', "Variation Operators" );
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// minimum check
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if ( (pCrossParam.value() < 0) || (pCrossParam.value() > 1) )
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throw std::runtime_error("Invalid pCross");
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eoValueParam<double>& pMutParam
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= _parser.getORcreateParam(0.1, "pMut",
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"Probability of Mutation",
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'M', "Variation Operators" );
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// minimum check
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if ( (pMutParam.value() < 0) || (pMutParam.value() > 1) )
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throw std::runtime_error("Invalid pMut");
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// the crossovers
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/////////////////
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// the parameters
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eoValueParam<double>& alphaParam
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= _parser.getORcreateParam(double(0.0), "alpha",
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"Bound for factor of linear recombinations",
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'a', "Variation Operators" );
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// minimum check
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if ( (alphaParam.value() < 0) )
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throw std::runtime_error("Invalid BLX coefficient alpha");
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eoValueParam<double>& segmentRateParam
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= _parser.getORcreateParam(double(1.0), "segmentRate",
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"Relative rate for segment crossover",
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's', "Variation Operators" );
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// minimum check
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if ( (segmentRateParam.value() < 0) )
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throw std::runtime_error("Invalid segmentRate");
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eoValueParam<double>& hypercubeRateParam
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= _parser.getORcreateParam(double(1.0), "hypercubeRate",
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"Relative rate for hypercube crossover",
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'A', "Variation Operators" );
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// minimum check
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if ( (hypercubeRateParam.value() < 0) )
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throw std::runtime_error("Invalid hypercubeRate");
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eoValueParam<double>& uxoverRateParam
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= _parser.getORcreateParam(double(1.0), "uxoverRate",
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"Relative rate for uniform crossover",
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'A', "Variation Operators" );
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// minimum check
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if ( (uxoverRateParam.value() < 0) )
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throw std::runtime_error("Invalid uxoverRate");
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// minimum check
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bool bCross = true;
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if (segmentRateParam.value()+hypercubeRateParam.value()+uxoverRateParam.value()==0)
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{
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std::cerr << "Warning: no crossover" << std::endl;
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bCross = false;
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}
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// Create the CombinedQuadOp
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eoPropCombinedQuadOp<EOT> *ptCombinedQuadOp = NULL;
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eoQuadOp<EOT> *ptQuad = NULL;
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if (bCross)
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{
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// segment crossover for bitstring - pass it the bounds
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ptQuad = new eoSegmentCrossover<EOT>(boundsParam.value(), alphaParam.value());
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_state.storeFunctor(ptQuad);
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ptCombinedQuadOp = new eoPropCombinedQuadOp<EOT>(*ptQuad, segmentRateParam.value());
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// hypercube crossover
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ptQuad = new eoHypercubeCrossover<EOT>(boundsParam.value(), alphaParam.value());
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_state.storeFunctor(ptQuad);
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ptCombinedQuadOp->add(*ptQuad, hypercubeRateParam.value());
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// uniform crossover
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ptQuad = new eoRealUXover<EOT>();
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_state.storeFunctor(ptQuad);
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ptCombinedQuadOp->add(*ptQuad, uxoverRateParam.value());
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// don't forget to store the CombinedQuadOp
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_state.storeFunctor(ptCombinedQuadOp);
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}
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// the mutations
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/////////////////
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// the parameters
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eoValueParam<double> & epsilonParam
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= _parser.getORcreateParam(0.01, "epsilon",
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"Half-size of interval for Uniform Mutation",
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'e', "Variation Operators" );
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// minimum check
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if ( (epsilonParam.value() < 0) )
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throw std::runtime_error("Invalid epsilon");
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eoValueParam<double> & uniformMutRateParam
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= _parser.getORcreateParam(1.0, "uniformMutRate",
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"Relative rate for uniform mutation",
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'u', "Variation Operators" );
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// minimum check
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if ( (uniformMutRateParam.value() < 0) )
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throw std::runtime_error("Invalid uniformMutRate");
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eoValueParam<double> & detMutRateParam
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= _parser.getORcreateParam(1.0, "detMutRate",
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"Relative rate for deterministic uniform mutation",
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'd', "Variation Operators" );
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// minimum check
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if ( (detMutRateParam.value() < 0) )
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throw std::runtime_error("Invalid detMutRate");
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eoValueParam<double> & normalMutRateParam
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= _parser.getORcreateParam(1.0, "normalMutRate",
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"Relative rate for Gaussian mutation", 'd', "Variation Operators" );
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// minimum check
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if ( (normalMutRateParam.value() < 0) )
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throw std::runtime_error("Invalid normalMutRate");
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eoValueParam<double> & sigmaParam
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= _parser.getORcreateParam(0.3, "sigma",
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"Sigma (fixed) for Gaussian mutation",
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's', "Variation Operators" );
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eoValueParam<double> & pNormalParam
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= _parser.getORcreateParam(1.0, "pNormal",
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"Proba. to change each variable for Gaussian mutation",
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's', "Variation Operators" );
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// minimum check
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bool bMut = true;
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if (uniformMutRateParam.value()+detMutRateParam.value()+normalMutRateParam.value()==0)
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{
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std::cerr << "Warning: no mutation" << std::endl;
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bMut = false;
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}
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if (!bCross && !bMut)
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throw std::runtime_error("No operator called in SGA operator definition!!!");
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// Create the CombinedMonOp
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eoPropCombinedMonOp<EOT> *ptCombinedMonOp = NULL;
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eoMonOp<EOT> *ptMon = NULL;
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if (bMut)
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{
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// uniform mutation on all components:
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// offspring(i) uniformly chosen in [parent(i)-epsilon, parent(i)+epsilon]
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ptMon = new eoUniformMutation<EOT>(boundsParam.value(), epsilonParam.value());
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_state.storeFunctor(ptMon);
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// create the CombinedMonOp
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ptCombinedMonOp = new eoPropCombinedMonOp<EOT>(*ptMon, uniformMutRateParam.value());
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// mutate exactly 1 component (uniformly) per individual
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ptMon = new eoDetUniformMutation<EOT>(boundsParam.value(), epsilonParam.value());
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_state.storeFunctor(ptMon);
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ptCombinedMonOp->add(*ptMon, detMutRateParam.value());
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// mutate all component using Gaussian mutation
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ptMon = new eoNormalVecMutation<EOT>(boundsParam.value(), sigmaParam.value(), pNormalParam.value());
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_state.storeFunctor(ptMon);
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ptCombinedMonOp->add(*ptMon, normalMutRateParam.value());
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_state.storeFunctor(ptCombinedMonOp);
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}
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// now build the eoGenOp:
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// to simulate SGA (crossover with proba pCross + mutation with proba pMut
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// we must construct
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// a sequential combination of
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// with proba 1, a proportional combination of
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// a QuadCopy and our crossover
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// with proba pMut, our mutation
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// the crossover - with probability pCross
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eoProportionalOp<EOT> * cross = new eoProportionalOp<EOT> ;
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_state.storeFunctor(cross);
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ptQuad = new eoQuadCloneOp<EOT>;
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_state.storeFunctor(ptQuad);
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cross->add(*ptCombinedQuadOp, pCrossParam.value()); // user crossover
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cross->add(*ptQuad, 1-pCrossParam.value()); // clone operator
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// now the sequential
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eoSequentialOp<EOT> & op = _state.storeFunctor(new eoSequentialOp<EOT>);
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op.add(*cross, 1.0); // always crossover (but clone with prob 1-pCross
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op.add(*ptCombinedMonOp, pMutParam.value());
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// that's it!
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return op;
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}
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/** @} */
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#endif
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