Migration from SVN

eo/src/eoGaussRealWeightUp.h

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+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoGaussRealWeightUp.h
+// (c) OPAC 2007
+/*
+    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: thomas.legrand@lifl.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef EOGAUSSREALWEIGHTUP_H
+#define EOGAUSSREALWEIGHTUP_H
+
+//-----------------------------------------------------------------------------
+#include <eoWeightUpdater.h>
+#include <utils/eoRNG.h>
+//-----------------------------------------------------------------------------
+
+
+/**
+ * Update an inertia weight by assigning it a Gaussian randomized value
+ * (used for the velocity in particle swarm optimization).
+ *
+ * @ingroup Variators
+ */
+class eoGaussRealWeightUp:public eoWeightUpdater<double>
+{
+public:
+
+    /**
+     * Default constructor
+     * @param _mean - Mean for Gaussian distribution
+     * @param _stdev - Standard deviation for Gaussian distribution
+     */
+    eoGaussRealWeightUp(
+        double  _mean=0,
+        double  _stdev=1.0
+    ):mean(_mean),stdev(_stdev){}
+
+    /**
+     * Assign Gaussian deviation  to _weight
+     * @param _weight - The modified weight as a double
+     */
+    void operator() (double & _weight)
+    {
+        _weight=rng.normal(mean,stdev);
+    }
+
+
+protected:
+    double mean,stdev;
+
+};
+
+
+
+#endif/*EOGAUSSREALWEIGHTUP_H*/