Changeset 3909 for trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Crossovers

Timestamp:

06/09/10 12:18:43 (14 years ago)

Author:

abeham

Message:

#1035

• Improved some other descriptions too

Location:

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

Files:

• BlendAlphaCrossover.cs (modified) (1 diff)
• UniformAllPositionsArithmeticCrossover.cs (modified) (1 diff)
• UniformSomePositionsArithmeticCrossover.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Crossovers/BlendAlphaCrossover.cs

@@ -54 +54 @@
     public BlendAlphaCrossover()
       : base() {
-      Parameters.Add(new ValueLookupParameter<DoubleValue>("Alpha", "Value for alpha", new DoubleValue(0.5)));
+      Parameters.Add(new ValueLookupParameter<DoubleValue>("Alpha", "The Alpha parameter controls the extension of the range beyond the two parents. It must be >= 0. A value of 0.5 means that half the range is added to both sides of the intervals.", new DoubleValue(0.5)));
     }
 

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Crossovers/UniformAllPositionsArithmeticCrossover.cs

@@ -35 +35 @@
   /// It is implemented as described in Michalewicz, Z. 1999. Genetic Algorithms + Data Structures = Evolution Programs. Third, Revised and Extended Edition, Spring-Verlag Berlin Heidelberg.
   /// </remarks>
-  [Item("UniformAllPositionsArithmeticCrossover", "The uniform all positions arithmetic crossover constructs an offspring by calculating x = alpha * p1 + (1-alpha) * p2 for every position x in the vector. Note that for alpha = 0.5 it is the same as the AverageCrossover. It is implemented as described in Michalewicz, Z. 1999. Genetic Algorithms + Data Structures = Evolution Programs. Third, Revised and Extended Edition, Spring-Verlag Berlin Heidelberg.")]
+  [Item("UniformAllPositionsArithmeticCrossover", "The uniform all positions arithmetic crossover constructs an offspring by calculating x = alpha * p1 + (1-alpha) * p2 for every position x in the vector. Note that for alpha = 0.5 it is the same as the AverageCrossover (except that the AverageCrossover is defined for more than 2 parents). It is implemented as described in Michalewicz, Z. 1999. Genetic Algorithms + Data Structures = Evolution Programs. Third, Revised and Extended Edition, Spring-Verlag Berlin Heidelberg.")]
   [StorableClass]
   public class UniformAllPositionsArithmeticCrossover : RealVectorCrossover {

trunk/sources/HeuristicLab.Encodings.RealVectorEncoding/3.3/Crossovers/UniformSomePositionsArithmeticCrossover.cs

@@ -56 +56 @@
     public UniformSomePositionsArithmeticCrossover()
       : base() {
-      Parameters.Add(new ValueLookupParameter<DoubleValue>("Alpha", "The alpha value in the range [0;1]", new DoubleValue(0.5)));
+      Parameters.Add(new ValueLookupParameter<DoubleValue>("Alpha", "The alpha value in the range [0;1] that defines whether the point should be close to parent1 (=1) or parent2 (=0)", new DoubleValue(0.5)));
       Parameters.Add(new ValueLookupParameter<DoubleValue>("Probability", "The probability for crossing a position in the range [0;1]", new DoubleValue(0.5)));
     }