Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / ga-0.10.0 / __ga_problem_private_state__.m

diff --git a/octave_packages/ga-0.10.0/__ga_problem_private_state__.m b/octave_packages/ga-0.10.0/__ga_problem_private_state__.m
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+++ b/octave_packages/ga-0.10.0/__ga_problem_private_state__.m
@@ -0,0 +1,49 @@
+## Copyright (C) 2008 Luca Favatella <slackydeb@gmail.com>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program 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 General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; If not, see <http://www.gnu.org/licenses/>.
+
+## Author: Luca Favatella <slackydeb@gmail.com>
+## Version: 1.1.1
+
+function private_state = __ga_problem_private_state__ (options)
+  private_state.ReproductionCount.elite = options.EliteCount;
+  private_state.ReproductionCount.crossover = \
+      fix (options.CrossoverFraction *
+           (options.PopulationSize - options.EliteCount));
+  private_state.ReproductionCount.mutation = \
+      options.PopulationSize - \
+      (private_state.ReproductionCount.elite +
+       private_state.ReproductionCount.crossover);
+  assert (private_state.ReproductionCount.elite +
+          private_state.ReproductionCount.crossover +
+          private_state.ReproductionCount.mutation,
+          options.PopulationSize); ## DEBUG
+
+  private_state.parentsCount.crossover = \
+      2 * private_state.ReproductionCount.crossover;
+  private_state.parentsCount.mutation = \
+      1 * private_state.ReproductionCount.mutation;
+  private_state.nParents = \
+      private_state.parentsCount.crossover + \
+      private_state.parentsCount.mutation;
+
+  private_state.parentsSelection.crossover = \
+      1:private_state.parentsCount.crossover;
+  private_state.parentsSelection.mutation = \
+      private_state.parentsCount.crossover + \
+      (1:private_state.parentsCount.mutation);
+  assert (length (private_state.parentsSelection.crossover) +
+          length (private_state.parentsSelection.mutation),
+          private_state.nParents); ## DEBUG
+endfunction
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