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