Changeset 2828

Timestamp:

02/18/10 16:14:04 (14 years ago)

Author:

gkronber

Message:

Prevented division by zero in relative error calculation for Theil's U. #879

File:

• trunk/sources/HeuristicLab.Modeling/3.2/SimpleTheilInequalityCoefficientEvaluator.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Modeling/3.2/SimpleTheilInequalityCoefficientEvaluator.cs

@@ -60 +60 @@
         double estimatedValue = values[sample, ESTIMATION_INDEX];
         double originalValue = values[sample, ORIGINAL_INDEX];
-        if (!double.IsNaN(originalValue) && !double.IsInfinity(originalValue)) {
+        if (!double.IsNaN(originalValue) && !double.IsInfinity(originalValue) && prevValue != 0.0) {
           double errorEstimatedChange = (estimatedValue - originalValue) / prevValue; // percentage error of predicted change
           errorsSquaredSum += errorEstimatedChange * errorEstimatedChange;