# eoStochTournamentSelect.h

    00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
    00002
    00003 //-----------------------------------------------------------------------------
    00004 // eoStochTournamentSelect.h
    00005 // (c) GeNeura Team, 1998 - EEAAX 1999
    00006 /*
    00007     This library is free software; you can redistribute it and/or
    00008     modify it under the terms of the GNU Lesser General Public
    00009     License as published by the Free Software Foundation; either
    00010     version 2 of the License, or (at your option) any later version.
    00011
    00012     This library is distributed in the hope that it will be useful,
    00013     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00015     Lesser General Public License for more details.
    00016
    00017     You should have received a copy of the GNU Lesser General Public
    00018     License along with this library; if not, write to the Free Software
    00019     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00020
    00021     Contact: todos@geneura.ugr.es, http://geneura.ugr.es
    00022              Marc.Schoenauer@polytechnique.fr
    00023  */
    00024 //-----------------------------------------------------------------------------
    00025
    00026 #ifndef eoStochTournamentSelect_h
    00027 #define eoStochTournamentSelect_h
    00028
    00029 //-----------------------------------------------------------------------------
    00030
    00031 #include <functional>
    00032 #include <numeric>           // accumulate
    00033 #include <eoSelectOne.h>     // eoSelectOne
    00034 #include <utils/selectors.h> // stochastic_tournament
    00035
    00036 //-----------------------------------------------------------------------------
    00040 //-----------------------------------------------------------------------------
    00041
    00042 template <class EOT> class eoStochTournamentSelect: public eoSelectOne<EOT>
    00043 {
    00044  public:
    00045
    00047   eoStochTournamentSelect(double _Trate = 1.0 ) : eoSelectOne<EOT>(), Trate(_Trate)
    00048   {
    00049     // consistency checks
    00050     if (Trate < 0.5) {
    00051       std::cerr << "Warning, Tournament rate should be > 0.5\nAdjusted to 0.55\n";
    00052       Trate = 0.55;
    00053     }
    00054     if (Trate > 1) {
    00055       std::cerr << "Warning, Tournament rate should be < 1\nAdjusted to 1\n";
    00056       Trate = 1;
    00057     }
    00058   }
    00059
    00061   virtual const EOT& operator()(const eoPop<EOT>& pop)
    00062   {
    00063       return stochastic_tournament(pop, Trate);
    00064   }
    00065
    00066 private:
    00067   double Trate;
    00068 };
    00069
    00070 //-----------------------------------------------------------------------------
    00071
    00072 #endif
    00073