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Adding PBIL files - simple PBIL algorithm with simple additive update rule

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evomarc 2001-11-08 06:49:38 +00:00
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eo/src/ga/make_PBILupdate.h Normal file
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// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
//-----------------------------------------------------------------------------
// make_PBILupdate.h
// (c) Marc Schoenauer, Maarten Keijzer, 2001
/*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact: Marc.Schoenauer@polytechnique.fr
mkeijzer@dhi.dk
*/
//-----------------------------------------------------------------------------
#ifndef _make_PBILupdate_h
#define _make_PBILupdate_h
#include <sys/time.h> // for time(0) for random seeding
#include <ga/eoPBILOrg.h>
#include <utils/eoRNG.h>
#include <utils/eoParser.h>
#include <utils/eoState.h>
///////CONSTRUCTION of PBIL distribution updaters/////////////////
/**
* Templatized version of parser-based construct of the update rule for PBIL
* distributions (see eoPBILDistrib.h)
*
* It must then be instantiated, and compiled on its own for a given EOType
* (see test/t-eoPBIL.cpp)
*
* Last argument is template-disambiguating
*/
template <class EOT>
eoDistribUpdater<EOT> & do_make_PBILupdate(eoParser & _parser, eoState& _state, EOT)
{
// ast the moment, a single update rule is available
// but at some point we'll have to choose among different rules
string UType = _parser.createParam(string("PBIL"), "updateRule", "Type of update rule (only PBIL additive at the moment)", 'U', "Algorithm").value();
unsigned nbBest = _parser.createParam(unsigned(1), "nbBest", "Number of good guys to update from", 'B', "Algorithm").value();
double LRBest = _parser.createParam(0.1, "LRBest", "Learning Rate (from best guys)", 'L', "Algorithm").value();
unsigned nbWorst = _parser.createParam(unsigned(0), "nbWorst", "Number of bad guys to update from", 'W', "Algorithm").value();
double LRWorst = _parser.createParam(0.01, "LRWorst", "Learning Rate (from best guys)", 'L', "Algorithm").value();
double tolerance = _parser.createParam(0.0, "tolerance", "Keeping away from 0 and 1", 't', "Algorithm").value();
// a pointer to choose among several possible types
eoDistribUpdater<EOT> * ptUpdate;
if (UType == string("PBIL"))
{
if ( (nbWorst == 0) && (nbBest == 1) )
ptUpdate = new eoPBILOrg<EOT>(LRBest, tolerance);
else
ptUpdate = new eoPBILAdditive<EOT>(LRBest, nbBest, tolerance, LRWorst, nbWorst);
}
else
throw runtime_error("Only PBIL additive update rule available at the moment");
// done: don't forget to store the allocated pointers
_state.storeFunctor(ptUpdate);
return *ptUpdate;
}
#endif