Changeset 12612 for trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/LogarithmicTransformation.cs

Timestamp:

07/06/15 15:58:16 (9 years ago)

Author:

gkronber

Message:

#2415: added StorableClass attribute to transformation functions (+code improvements)

File:

• trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/LogarithmicTransformation.cs (modified) (2 diffs)

trunk/sources/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Transformations/LogarithmicTransformation.cs

@@ -9 +9 @@
 
 namespace HeuristicLab.Problems.DataAnalysis {
+  [StorableClass]
   [Item("Logarithmic Transformation", "f(x) = log(x, b) | Represents a logarithmic transformation.")]
   public class LogarithmicTransformation : Transformation<double> {
@@ -43 +44 @@
 
     public override IEnumerable<double> Apply(IEnumerable<double> data) {
-      foreach (double i in data) {
-        if (i > 0.0)
-          yield return Math.Log(i, Base);
-        else
-          yield return i;
-      }
+      var b = Base;
+      return data.Select(d => d > 0.0 ? Math.Log(d, b) : d);
     }