Changeset 3187 for trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Manipulators

Timestamp:

03/22/10 22:58:43 (15 years ago)

Author:

abeham

Message:

Added move operators for real encoding and test functions #890

Location:

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Manipulators

Files:

• PolynomialAllPositionManipulator.cs (modified) (1 diff)
• PolynomialOnePositionManipulator.cs (modified) (2 diffs)

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Manipulators/PolynomialAllPositionManipulator.cs

@@ -48 +48 @@
     /// </summary>
     /// <remarks>
-    /// The manipulated value is not restricted by the (possibly) specified lower and upper bounds. Use the <see cref="BoundsChecker"/> to correct the values after performing the mutation.
+    /// If there are bounds specified the manipulated value is restricted by the given lower and upper bounds.
     /// </remarks>
     public ValueLookupParameter<DoubleValue> MaximumManipulationParameter {

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Manipulators/PolynomialOnePositionManipulator.cs

@@ -47 +47 @@
     /// </summary>
     /// <remarks>
-    /// The manipulated value is not restricted by the (possibly) specified lower and upper bounds. Use the <see cref="BoundsChecker"/> to correct the values after performing the mutation.
+    /// If there are bounds specified the manipulated value is restricted by the given lower and upper bounds.
     /// </remarks>
     public ValueLookupParameter<DoubleValue> MaximumManipulationParameter {
@@ -73 +73 @@
       if (contiguity.Value < 0) throw new ArgumentException("PolynomialOnePositionManipulator: Contiguity value is smaller than 0", "contiguity");
       int index = random.Next(vector.Length);
+      vector[index] += Apply(random, contiguity.Value) * maxManipulation.Value;
+    }
+
+    public static double Apply(IRandom random, double contiguity) {
       double u = random.NextDouble(), delta = 0;
 
       if (u < 0.5) {
-        delta = Math.Pow(2 * u, 1.0 / (contiguity.Value + 1)) - 1.0;
+        delta = Math.Pow(2 * u, 1.0 / (contiguity + 1)) - 1.0;
       } else if (u > 0.5) {
-        delta = 1.0 - Math.Pow(2.0 - 2.0 * u, 1.0 / contiguity.Value + 1);
-      } else if (u == 0.5) delta = 0;
+        delta = 1.0 - Math.Pow(2.0 - 2.0 * u, 1.0 / contiguity + 1);
+      } else delta = 0;
 
-      vector[index] += delta * maxManipulation.Value;
+      return delta;
     }