Changeset 17333 for branches/2521_ProblemRefactoring/HeuristicLab.Problems.DataAnalysis

Timestamp:

10/17/19 10:01:44 (5 years ago)

Author:

mkommend

Message:

#2521: Updated branch with most recent trunk changes.

Location:

branches/2521_ProblemRefactoring

Files:

• . (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis/3.4 (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Interval.cs (modified) (1 diff)

branches/2521_ProblemRefactoring/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/Interval.cs

@@ -226 +226 @@
 
     public static Interval CubicRoot(Interval a) {
-      if (a.LowerBound < 0) return new Interval(double.NaN, double.NaN);
-      return new Interval(Math.Pow(a.LowerBound, 1.0/3), Math.Pow(a.UpperBound, 1.0/3));
+      var lower = (a.LowerBound < 0) ? -Math.Pow(-a.LowerBound, 1d / 3d) : Math.Pow(a.LowerBound, 1d / 3d);
+      var upper = (a.UpperBound < 0) ? -Math.Pow(-a.UpperBound, 1d / 3d) : Math.Pow(a.UpperBound, 1d / 3d);
+
+      return new Interval(lower, upper);
+    }
+
+    public static Interval Absolute(Interval a) {
+      var absLower = Math.Abs(a.LowerBound);
+      var absUpper = Math.Abs(a.UpperBound);
+      return new Interval(Math.Min(absLower, absUpper), Math.Max(absLower, absUpper));
     }
     #endregion