Changeset 18174

Timestamp:

01/02/22 21:19:55 (3 years ago)

Author:

gkronber

Message:

#3140: fixed a bug in the calculation of derivatives introduced with changes in the NumberSymbols branch

File:

• trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Converters/DerivativeCalculator.cs (modified) (1 diff)

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Converters/DerivativeCalculator.cs

@@ -158 +158 @@
           var newExponent = (NumberTreeNode)numberSy.CreateTreeNode();
           newExponent.Value = ((NumberTreeNode)newPower.GetSubtree(1)).Value - 1;
+          newPower.RemoveSubtree(1);
+          newPower.AddSubtree(newExponent);
           return Product(Product(CreateNumber(exponent.Value), newPower), Derive(f, variableName));
         } else throw new NotSupportedException("Cannot derive non-integer powers");