Changeset 478 for trunk/sources/HeuristicLab.StructureIdentification/Evaluation

Timestamp:

08/09/08 14:14:30 (16 years ago)

Author:

gkronber

Message:

fixed another small glitch in the classification evaluator

File:

• trunk/sources/HeuristicLab.StructureIdentification/Evaluation/ClassificationMeanSquaredErrorEvaluator.cs (modified) (3 diffs)

trunk/sources/HeuristicLab.StructureIdentification/Evaluation/ClassificationMeanSquaredErrorEvaluator.cs

@@ -33 +33 @@
   public class ClassificationMeanSquaredErrorEvaluator : GPEvaluatorBase {
     protected double[] backupValues;
+    private const double EPSILON = 1.0E-6;
     public override string Description {
       get {
@@ -69 +70 @@
         // on the lower end and upper end only add linear error if the absolute error is larger than 1
         // the error>1.0 constraint is needed for balance because in the interval ]-1, 1[ the squared error is smaller than the absolute error
-        if(error < -1.0 && original == classesArr[0] && estimated < classesArr[0] ||
-          error > 1.0 && original == classesArr[classesArr.Length - 1] && estimated > classesArr[classesArr.Length - 1]) {
+        if(error < -1.0 && IsEqual(original, classesArr[0]) && estimated < classesArr[0] ||
+          error > 1.0 && IsEqual(original, classesArr[classesArr.Length - 1]) && estimated > classesArr[classesArr.Length - 1]) {
           errorsSquaredSum += Math.Abs(error); // only add linear error below the smallest class or above the largest class
         } else {
@@ -84 +85 @@
       return errorsSquaredSum;
     }
+
+    private bool IsEqual(double x, double y) {
+      return Math.Abs(x - y) < EPSILON;
+    }
   }
 }