Changeset 5381 for trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/StrategyParameters/StdDevStrategyVectorManipulator.cs

Timestamp:

01/26/11 18:39:49 (13 years ago)

Author:

abeham

Message:

#1395

• Allowed to select the bounds checker to use in all RealVectorManipulator and RealVectorCrossover operators
• Added a second bounds checker, the ReflectiveBoundsChecker which does not cut at the bounds, but mirrors the vector at the bounds
• Use a repeating strategy in the move generators
• Removed obsolete IRealVectorPSODecoder and IRealVectorPSOEncoder interfaces
• Marked RealVectorToRealVectorEncoder as obsolete, internal and removed all meaningful code from it (it slipped into the release and should be thrown out as soon as possible)
• Use a repeating strategy to stick within the bounds in the StdDevStrategyVectorManipulator when manipulating the mutation strengths
• By default use smaller initial bounds in the StdDevStrategyVectorCreator (parameterized by the problem)

File:

• trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/StrategyParameters/StdDevStrategyVectorManipulator.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/StrategyParameters/StdDevStrategyVectorManipulator.cs

@@ -89 +89 @@
       double generalMultiplier = Math.Exp(generalLearningRate * N.NextDouble());
       for (int i = 0; i < vector.Length; i++) {
-        vector[i] *= generalMultiplier * Math.Exp(learningRate * N.NextDouble());
+        double change = vector[i] * generalMultiplier * Math.Exp(learningRate * N.NextDouble());
         if (bounds != null) {
           double min = bounds[i % bounds.Rows, 0], max = bounds[i % bounds.Rows, 1];
-          if (vector[i] < min) vector[i] = min;
-          if (vector[i] > max) vector[i] = max;
+          if (min == max) vector[i] = min;
+          else {
+            while (change < min || change > max)
+              change = vector[i] * generalMultiplier * Math.Exp(learningRate * N.NextDouble());
+            vector[i] = change;
+          }
         }
       }