Changeset 3997 for trunk/sources/HeuristicLab.Problems.DataAnalysis/3.3/Symbolic/Symbols/VariableTreeNode.cs

Timestamp:

07/06/10 11:59:50 (14 years ago)

Author:

gkronber

Message:

Minor improvements concerning efficiency of symbolic expression tree encoding data structures and operators. #1073

File:

• trunk/sources/HeuristicLab.Problems.DataAnalysis/3.3/Symbolic/Symbols/VariableTreeNode.cs (modified) (2 diffs)

trunk/sources/HeuristicLab.Problems.DataAnalysis/3.3/Symbolic/Symbols/VariableTreeNode.cs

@@ -67 +67 @@
     public override void ResetLocalParameters(IRandom random) {
       base.ResetLocalParameters(random);
-      var normalDistributedRNG = new NormalDistributedRandom(random, Symbol.WeightNu, Symbol.WeightSigma);
-      weight = normalDistributedRNG.NextDouble();
+      weight = NormalDistributedRandom.NextDouble(random, Symbol.WeightNu, Symbol.WeightSigma);
       variableName = Symbol.VariableNames.SelectRandom(random);
     }
@@ -74 +73 @@
     public override void ShakeLocalParameters(IRandom random, double shakingFactor) {
       base.ShakeLocalParameters(random, shakingFactor);
-      var normalDistributedRNG = new NormalDistributedRandom(random, Symbol.WeightManipulatorNu, Symbol.WeightManipulatorSigma);
-      double x = normalDistributedRNG.NextDouble();
+      double x = NormalDistributedRandom.NextDouble(random, Symbol.WeightManipulatorNu, Symbol.WeightManipulatorSigma);
       weight = weight + x * shakingFactor;
       variableName = Symbol.VariableNames.SelectRandom(random);