New ES routines

eo/src/es/eoEsChromInit.h

@@ -0,0 +1,134 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoEsChromInit.h
+// (c) Maarten Keijzer 2000, GeNeura Team, 1998 - EEAAX 1999
+/* 
+    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: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@polytechnique.fr
+             mak@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoEsChromInit_H
+#define _eoEsChromInit_H
+
+#include <es/eoEsObjectiveBounds.h>
+#include <es/eoEsSimple.h>
+#include <es/eoEsStdev.h>
+#include <es/eoEsFull.h>
+#include <utils/eoRNG.h>
+
+#include <eoInit.h>
+
+#ifndef M_PI
+#define M_PI 3.1415926535897932384626433832795
+#endif
+
+/**
+\ingroup EvolutionStrategies
+    
+    Random Es-chromosome initializer (therefore derived from eoRnd)
+
+    This class can initialize three types of Es's:
+
+    eoEsSimple 
+    eoEsStdev  
+    eoEsFull   
+
+    @see eoEsSimple eoEsStdev eoEsFull eoInit
+*/
+
+template <class EOT>
+class eoEsChromInit : public eoInit<EOT>
+{
+public :
+    typedef typename EOT::Fitness FitT;
+
+    eoEsChromInit(eoEsObjectiveBounds& _bounds) : bounds(_bounds)
+    {}
+
+    EOT operator()()
+    {
+        return create(EOT());
+    }
+
+private :
+
+    eoEsSimple<FitT>& create(eoEsSimple<FitT>& result)
+    {
+        result.resize(bounds.chromSize());
+
+        for (unsigned i = 0; i < result.size(); ++i)
+        {
+            result[i] = bounds.minimum(i) + rng.uniform(bounds.maximum(i) - bounds.minimum(i));
+        }
+
+        return result;
+    }
+
+    eoEsStdev<FitT> create(eoEsStdev<FitT>& result)
+    {
+        unsigned chromSize = bounds.chromSize();
+        result.resize(chromSize);
+        result.stdevs.resize(chromSize);
+
+        for (unsigned i = 0; i < chromSize; ++i)
+        {
+            double length = bounds.maximum(i) - bounds.minimum(i);
+            result[i] = bounds.minimum(i) + rng.uniform(length);
+        
+            // Just a guess at the stdevs (anyone a better idea?)
+            result.stdevs[i] = rng.uniform(length);
+        }
+    
+        return result;
+    }
+
+    eoEsFull<FitT>  create(eoEsFull<FitT>& result)
+    {
+        unsigned chromSize = bounds.chromSize();
+        result.resize(chromSize);
+        result.stdevs.resize(chromSize);
+
+        unsigned i;
+
+        for (i = 0; i < chromSize; ++i)
+        {
+            double length = bounds.maximum(i) - bounds.minimum(i);
+            result[i] = bounds.minimum(i) + rng.uniform(length);
+        
+            // Just a guess at the stdevs (anyone a better idea?)
+            result.stdevs[i] = rng.uniform(length);
+        }
+        
+        // nb of rotation angles: N*(N-1)/2 (in general!)
+        result.correlations.resize(chromSize*(chromSize - 1) / 2);
+        
+        for (i = 0; i < result.correlations.size(); ++i)
+        {
+            // And another random guess for random initialization 
+            result.correlations[i] = rng.uniform(2 * M_PI) - M_PI;
+        }
+
+        return result;
+    }
+
+    eoEsObjectiveBounds& bounds;
+};
+
+#endif