Changeset 14221 for trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs

Timestamp:

07/29/16 11:10:58 (8 years ago)

Author:

bburlacu

Message:

#2647: Addressed the issue described above by adding the [Storable] attribute to the node parent member, and cloning the swapped subtree during crossover.

File:

• trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs

@@ -111 +111 @@
       } else {
         var selectedBranch = SelectRandomBranch(random, allowedBranches, internalCrossoverPointProbability);
+        if (selectedBranch != null)
+          selectedBranch = (ISymbolicExpressionTreeNode)selectedBranch.Clone();
 
         if (crossoverPoint0.Child != null) {