79 lines
3.1 KiB
C++
79 lines
3.1 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// make_PBILupdate.h
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// (c) Marc Schoenauer, Maarten Keijzer, 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: 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_PBILupdate_h
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#define _make_PBILupdate_h
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#include <ga/eoPBILOrg.h>
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#include <utils/eoRNG.h>
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#include <utils/eoParser.h>
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#include <utils/eoState.h>
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///////CONSTRUCTION of PBIL distribution updaters/////////////////
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/**
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* Templatized version of parser-based construct of the update rule for PBIL
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* distributions (see eoPBILDistrib.h)
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*
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* It must then be instantiated, and compiled on its own for a given EOType
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* (see test/t-eoPBIL.cpp)
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*
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* Last argument is template-disambiguating
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*/
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template <class EOT>
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eoDistribUpdater<EOT> & do_make_PBILupdate(eoParser & _parser, eoState& _state, EOT)
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{
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// ast the moment, a single update rule is available
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// but at some point we'll have to choose among different rules
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std::string UType = _parser.createParam(std::string("PBIL"), "updateRule", "Type of update rule (only PBIL additive at the moment)", 'U', "Algorithm").value();
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unsigned nbBest = _parser.createParam(unsigned(1), "nbBest", "Number of good guys to update from", 'B', "Algorithm").value();
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double LRBest = _parser.createParam(0.1, "LRBest", "Learning Rate (from best guys)", 'L', "Algorithm").value();
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unsigned nbWorst = _parser.createParam(unsigned(0), "nbWorst", "Number of bad guys to update from", 'W', "Algorithm").value();
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double LRWorst = _parser.createParam(0.01, "LRWorst", "Learning Rate (from best guys)", 'L', "Algorithm").value();
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double tolerance = _parser.createParam(0.0, "tolerance", "Keeping away from 0 and 1", 't', "Algorithm").value();
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// a pointer to choose among several possible types
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eoDistribUpdater<EOT> * ptUpdate;
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if (UType == std::string("PBIL"))
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{
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if ( (nbWorst == 0) && (nbBest == 1) )
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ptUpdate = new eoPBILOrg<EOT>(LRBest, tolerance);
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else
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ptUpdate = new eoPBILAdditive<EOT>(LRBest, nbBest, tolerance, LRWorst, nbWorst);
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}
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else
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throw std::runtime_error("Only PBIL additive update rule available at the moment");
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// done: don't forget to store the allocated pointers
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_state.storeFunctor(ptUpdate);
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return *ptUpdate;
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}
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#endif
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