Changeset 14228 for trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Friedman

Timestamp:

08/02/16 18:09:47 (8 years ago)

Author:

gkronber

Message:

#2371: added constructors to allow specification of random seeds for randomly generated regression problem instances (primarily for unit tests)

File:

• trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Friedman/FriedmanRandomFunctionInstanceProvider.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Friedman/FriedmanRandomFunctionInstanceProvider.cs

@@ -40 +40 @@
       get { return "Friedman, Jerome H. 'Greedy function approximation: a gradient boosting machine.' Annals of statistics (2001): 1189-1232."; }
     }
+    public int Seed { get; }
+
+    public FriedmanRandomFunctionInstanceProvider() : base() {
+    }
+
+    public FriedmanRandomFunctionInstanceProvider(int seed) : base() {
+      Seed = seed;
+    }
 
     public override IEnumerable<IDataDescriptor> GetDataDescriptors() {
       var numVariables = new int[] { 10, 25, 50, 100 };
       var noiseRatios = new double[] { 0.01, 0.05, 0.1 };
-      var rand = new System.Random(1234); // use fixed seed for deterministic problem generation
+      var rand = new MersenneTwister((uint)Seed); // use fixed seed for deterministic problem generation
       return (from size in numVariables
               from noiseRatio in noiseRatios