100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// eoPBILDistrib.h
|
|
// (c) Marc Schoenauer, 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@inria.fr
|
|
*/
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifndef _eoPBILDistrib_H
|
|
#define _eoPBILDistrib_H
|
|
|
|
#include "../eoDistribution.h"
|
|
|
|
/**
|
|
* Distribution Class for PBIL algorithm
|
|
* (Population-Based Incremental Learning, Baluja and Caruana 96)
|
|
*
|
|
* It encodes a univariate distribution on the space of bitstrings,
|
|
* i.e. one probability for each bit to be one
|
|
*
|
|
* It is an eoValueParam<std::vector<double> > :
|
|
* the std::vector<double> stores the probabilities that each bit is 1
|
|
*
|
|
* It is still pure virtual, as the update method needs to be specified
|
|
*/
|
|
|
|
template <class EOT>
|
|
class eoPBILDistrib : public eoDistribution<EOT>,
|
|
public eoValueParam<std::vector<double> >
|
|
{
|
|
public:
|
|
/** Ctor with size of genomes, and update parameters */
|
|
eoPBILDistrib(unsigned _genomeSize) :
|
|
eoDistribution<EOT>(),
|
|
eoValueParam<std::vector<double> >(std::vector<double>(_genomeSize, 0.5), "Distribution"),
|
|
genomeSize(_genomeSize)
|
|
{}
|
|
|
|
/** the randomizer of indis */
|
|
virtual void operator()(EOT & _eo)
|
|
{
|
|
_eo.resize(genomeSize); // just in case
|
|
for (unsigned i=0; i<genomeSize; i++)
|
|
_eo[i] = eo::rng.flip(value()[i]);
|
|
_eo.invalidate(); // DO NOT FORGET!!!
|
|
}
|
|
|
|
/** Accessor to the genome size */
|
|
unsigned Size() {return genomeSize;}
|
|
|
|
/** printing... */
|
|
virtual void printOn(std::ostream& os) const
|
|
{
|
|
os << value().size() << ' ';
|
|
for (unsigned i=0; i<value().size(); i++)
|
|
os << value()[i] << ' ';
|
|
}
|
|
|
|
/** reading...*/
|
|
virtual void readFrom(std::istream& is)
|
|
{
|
|
unsigned sz;
|
|
is >> sz;
|
|
|
|
value().resize(sz);
|
|
unsigned i;
|
|
|
|
for (i = 0; i < sz; ++i)
|
|
{
|
|
double atom;
|
|
is >> atom;
|
|
value()[i] = atom;
|
|
}
|
|
}
|
|
|
|
unsigned int size() {return genomeSize;}
|
|
|
|
virtual std::string className() const {return "eoPBILDistrib";};
|
|
|
|
private:
|
|
unsigned genomeSize; // size of indis
|
|
};
|
|
|
|
#endif
|