Changeset 3094 for trunk/sources/HeuristicLab.Optimization.Operators/3.3/ExponentialDiscreteDoubleValueModifier.cs

Timestamp:

03/18/10 02:03:30 (15 years ago)

Author:

abeham

Message:

Completed main loop of simulated annealing
Added a ProbabilisticQualityComparator (derived from QualityComparator)
Added an exception in ExponentialDiscreteDoubleValueModifier when startValue, endValue, or both are <= 0.
#923

File:

• trunk/sources/HeuristicLab.Optimization.Operators/3.3/ExponentialDiscreteDoubleValueModifier.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Optimization.Operators/3.3/ExponentialDiscreteDoubleValueModifier.cs

@@ -31 +31 @@
   [StorableClass]
   public class ExponentialDiscreteDoubleValueModifier : DiscreteDoubleValueModifier {
+    /// <summary>
+    /// Calculates a new value based on exponential decay or growth.
+    /// </summary>
+    /// <exception cref="ArgumentException">Thrown when endValue or startValue or both are 0.</exception>
+    /// <param name="value">The last value.</param>
+    /// <param name="startValue">The start value.</param>
+    /// <param name="endValue">The end value.</param>
+    /// <param name="index">The current index.</param>
+    /// <param name="startIndex">The start index.</param>
+    /// <param name="endIndex">The end index.</param>
+    /// <returns>The new value.</returns>
     protected override double Modify(double value, double startValue, double endValue, int index, int startIndex, int endIndex) {
+      if (endValue <= 0 || startValue <= 0) throw new ArgumentException("ExponentialDiscreteDoubleValueModifier: startValue and endValue must be greater than 0.");
       double b = Math.Pow(endValue / startValue, 1.0 / (endIndex - startIndex));
       return startValue * Math.Pow(b, index - startIndex);