Migration from SVN

eo/src/es/eoEsGlobalXover.h

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+/** -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoEsGlobalXover.h : ES global crossover
+// (c) Marc Schoenauer 2001
+
+    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: marc.schoenauer@polytechnique.fr http://eeaax.cmap.polytchnique.fr/
+ */
+//-----------------------------------------------------------------------------
+
+
+#ifndef _eoEsGlobalXover_H
+#define _eoEsGlobalXover_H
+
+#include <utils/eoRNG.h>
+
+#include <es/eoEsSimple.h>
+#include <es/eoEsStdev.h>
+#include <es/eoEsFull.h>
+
+#include <eoGenOp.h>
+// needs a selector - here random
+#include <eoRandomSelect.h>
+
+/** Global crossover operator for ES genotypes.
+  *  Uses some Atom crossovers to handle both the object variables
+  *  and the mutation strategy parameters
+  *
+  *  @ingroup Real
+  *  @ingroup Variators
+  */
+template<class EOT>
+class eoEsGlobalXover: public eoGenOp<EOT>
+{
+public:
+  typedef typename EOT::Fitness FitT;
+
+  /**
+   * (Default) Constructor.
+   */
+  eoEsGlobalXover(eoBinOp<double> & _crossObj, eoBinOp<double> & _crossMut) :
+    crossObj(_crossObj), crossMut(_crossMut) {}
+
+  /// The class name. Used to display statistics
+  virtual std::string className() const { return "eoEsGlobalXover"; }
+
+  /// The TOTAL number of offspring (here = nb of parents modified in place)
+  unsigned max_production(void) { return 1; }
+
+  /**
+   * modifies one parents in the populator
+   *     using 2 new parents for each component!
+   *
+   * @param _plop a POPULATOR (not a simple population)
+   */
+  void apply(eoPopulator<EOT>& _plop)
+  {
+    // First, select as many parents as you will have offspring
+    EOT& parent = *_plop; // select the first parent
+
+    // first, the object variables
+    for (unsigned i=0; i<parent.size(); i++)
+      {
+        // get extra parents - use private selector
+        // _plop.source() is the eoPop<EOT> used by _plop to get parents
+        const EOT& realParent1 = sel(_plop.source());
+        const EOT& realParent2 = sel(_plop.source());
+        parent[i] = realParent1[i];
+        crossObj(parent[i], realParent2[i]); // apply eoBinOp
+      }
+    // then the self-adaptation parameters
+    cross_self_adapt(parent, _plop.source());
+    // dont' forget to invalidate
+    parent.invalidate();
+  }
+
+private:
+
+  /** Method for cross self-adaptation parameters
+
+  Specialization for eoEsSimple.
+  */
+  void cross_self_adapt(eoEsSimple<FitT> & _parent, const eoPop<eoEsSimple<FitT> >& _pop)
+  {
+    const EOT& realParent1 = sel(_pop);
+    const EOT& realParent2 = sel(_pop);
+    _parent.stdev = realParent1.stdev;
+    crossMut(_parent.stdev, realParent2.stdev); // apply eoBinOp
+  }
+
+  /** Method for cross self-adaptation parameters
+
+  Specialization for eoEsStdev.
+  */
+  void cross_self_adapt(eoEsStdev<FitT> & _parent, const eoPop<eoEsStdev<FitT> >& _pop)
+  {
+    for (unsigned i=0; i<_parent.size(); i++)
+      {
+        const EOT& realParent1 = sel(_pop);
+        const EOT& realParent2 = sel(_pop);
+        _parent.stdevs[i] = realParent1.stdevs[i];
+        crossMut(_parent.stdevs[i], realParent2.stdevs[i]); // apply eoBinOp
+      }
+  }
+
+  /** Method for cross self-adaptation parameters
+
+  Specialization for eoEsFull.
+  */
+  void cross_self_adapt(eoEsFull<FitT> & _parent, const eoPop<eoEsFull<FitT> >& _pop)
+  {
+    unsigned i;
+    // the StDev
+    for (i=0; i<_parent.size(); i++)
+      {
+        const EOT& realParent1 = sel(_pop);
+        const EOT& realParent2 = sel(_pop);
+        _parent.stdevs[i] = realParent1.stdevs[i];
+        crossMut(_parent.stdevs[i], realParent2.stdevs[i]); // apply eoBinOp
+      }
+    // the roataion angles
+    for (i=0; i<_parent.correlations.size(); i++)
+      {
+        const EOT& realParent1 = sel(_pop);
+        const EOT& realParent2 = sel(_pop);
+        _parent.correlations[i] = realParent1.correlations[i];
+        crossMut(_parent.correlations[i], realParent2.correlations[i]); // apply eoBinOp
+      }
+
+  }
+
+  // the data
+  eoRandomSelect<EOT> sel;
+  eoBinOp<double> & crossObj;
+  eoBinOp<double> & crossMut;
+};
+
+#endif