Changeset 17491

Timestamp:

04/02/20 09:43:50 (5 years ago)

Author:

gkronber

Message:

#3067: fix reproducability by calling the PRNG only when probability is < 1

File:

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

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

@@ -106 +106 @@
       double probability,
       double internalCrossoverPointProbability, int maxTreeLength, int maxTreeDepth) {
-      if (random.NextDouble() >= probability) return random.NextDouble() < 0.5 ? parent0 : parent1;
+      if ((probability < 1) && (random.NextDouble() >= probability)) return random.NextDouble() < 0.5 ? parent0 : parent1;
       // select a random crossover point in the first parent 
       CutPoint crossoverPoint0;