93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// eoRandomSelect.h
|
|
// (c) GeNeura Team, 1998 - EEAAX 1999, Maarten Keijzer 2000
|
|
/*
|
|
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: todos@geneura.ugr.es, http://geneura.ugr.es
|
|
Marc.Schoenauer@polytechnique.fr
|
|
mak@dhi.dk
|
|
*/
|
|
|
|
#ifndef eoRandomSelect_h
|
|
#define eoRandomSelect_h
|
|
|
|
/** This file contains straightforward selectors:
|
|
* eoRandomSelect returns an individual uniformly selected
|
|
* eoBestSelect always return the best individual
|
|
* eoSequentialSelect returns all individuals in turn
|
|
*/
|
|
|
|
#include <utils/eoRNG.h>
|
|
#include <eoSelectOne.h>
|
|
|
|
/** eoRandomSelect: a selection method that selects ONE individual randomly
|
|
*
|
|
* @ingroup Selectors
|
|
*/
|
|
template <class EOT> class eoRandomSelect: public eoSelectOne<EOT>
|
|
{
|
|
public:
|
|
|
|
/// not a big deal!!!
|
|
virtual const EOT& operator()(const eoPop<EOT>& _pop)
|
|
{
|
|
return _pop[eo::rng.random(_pop.size())] ;
|
|
}
|
|
};
|
|
|
|
/** eoBestSelect: a selection method that always return the best
|
|
* (mainly for testing purposes)
|
|
*
|
|
* @ingroup Selectors
|
|
*/
|
|
template <class EOT> class eoBestSelect: public eoSelectOne<EOT>
|
|
{
|
|
public:
|
|
|
|
/// not a big deal!!!
|
|
virtual const EOT& operator()(const eoPop<EOT>& _pop)
|
|
{
|
|
return _pop.best_element() ;
|
|
}
|
|
};
|
|
|
|
/** eoNoSelect: returns all individual in order WITHOUT USING FITNESS!!!
|
|
* looping back to the beginning when exhasuted
|
|
*
|
|
* @ingroup Selectors
|
|
*/
|
|
template <class EOT> class eoNoSelect: public eoSelectOne<EOT>
|
|
{
|
|
public:
|
|
/** Ctor
|
|
*/
|
|
eoNoSelect(): current(0) {}
|
|
|
|
virtual const EOT& operator()(const eoPop<EOT>& _pop)
|
|
{
|
|
if (current >= _pop.size())
|
|
current=0;
|
|
|
|
current++;
|
|
return _pop[current-1] ;
|
|
}
|
|
private:
|
|
unsigned current;
|
|
};
|
|
|
|
#endif
|