91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/** -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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-----------------------------------------------------------------------------
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eoDetSelect.h
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(c) Marc Schoenauer, Maarten Keijzer, GeNeura Team, 2000
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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 _eoDetSelect_h
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#define _eoDetSelect_h
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//-----------------------------------------------------------------------------
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#include <eoSelect.h>
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#include <utils/eoHowMany.h>
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#include <math.h>
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//-----------------------------------------------------------------------------
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/** eoDetSelect selects many individuals deterministically
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*
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* @ingroup Selectors
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*/
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template<class EOT>
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class eoDetSelect : public eoSelect<EOT>
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{
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public:
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/// init
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eoDetSelect(double _rate = 1.0, bool _interpret_as_rate = true)
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: howMany(_rate, _interpret_as_rate) {}
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/**
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@param _source the source population
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@param _dest the resulting population (size of this population is
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given by the HowMany data
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It empties the destination and adds the selection into it)
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*/
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virtual void operator()(const eoPop<EOT>& _source, eoPop<EOT>& _dest)
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{
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unsigned int pSize = _source.size();
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size_t target = howMany(pSize);
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if ( target == 0 )
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{
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eo::log << eo::warnings << "Call to a eoHowMany instance returns 0 (target=" << target << ") it will be replaced by 1 to continue." << std::endl;
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target = 1;
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}
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_dest.resize(target);
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unsigned remain = target % pSize;
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unsigned entireCopy = target / pSize;
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typename eoPop<EOT>::iterator it = _dest.begin();
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if (target >= pSize)
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{
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for (unsigned i=0; i<entireCopy; i++)
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{
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std::copy(_source.begin(), _source.end(), it);
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it += pSize;
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}
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}
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// the last ones
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if (remain)
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{
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std::copy(_source.begin(), _source.begin()+remain, it);
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}
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}
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private :
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eoHowMany howMany;
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};
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#endif
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