Changeset 8224 for trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Nguyen/NguyenFunctionSeven.cs

Timestamp:

07/05/12 09:44:06 (12 years ago)

Author:

gkronber

Message:

#1784: fixed uniform sampling. Adapted Nguyen instances.

File:

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

trunk/sources/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Nguyen/NguyenFunctionSeven.cs

@@ -27 +27 @@
   public class NguyenFunctionSeven : ArtificialRegressionDataDescriptor {
 
-    public override string Name { get { return "Nguyen F7 = log(x + 1) + log(x^2 + 1)"; } }
+    public override string Name { get { return "Nguyen F7 = log(x + 1) + log(x² + 1)"; } }
     public override string Description {
       get {
         return "Paper: Semantically-based Crossover in Genetic Programming: Application to Real-valued Symbolic Regression" + Environment.NewLine
         + "Authors: Nguyen Quang Uy · Nguyen Xuan Hoai · Michael O’Neill · R.I. McKay · Edgar Galvan-Lopez" + Environment.NewLine
-        + "Function: F7 = log(x + 1) + log(x^2 + 1)" + Environment.NewLine
-        + "Fitcases: 20 random points ⊆ [0, 2]" + Environment.NewLine
-        + "Non-terminals: +, -, *, /, sin, cos, exp, log (protected version)" + Environment.NewLine
-        + "Terminals: X, 1 for single variable problems, and X, Y for bivariable problems";
+        + "Function: F7 = ln(x + 1) + ln(x² + 1)" + Environment.NewLine
+        + "Fitcases: 20 random points in [0, 2]" + Environment.NewLine
+        + "Non-terminals: +, -, *, % (protected division), sin, cos, exp, ln(|x|) (protected log)" + Environment.NewLine
+        + "Terminals: only variables (no random constants)";
       }
     }