Changeset 16206

Timestamp:

10/02/18 09:57:10 (6 years ago)

Author:

gkronber

Message:

#2948 added first implementation of symbolic differentiation as well as a test case (to be checked manually)

Location:

trunk

Files:

• HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Converters/DerivativeCalculator.cs (added)
• HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Converters/TreeSimplifier.cs (modified) (1 diff)
• HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4.csproj (modified) (1 diff)
• HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/DeriveTest.cs (added)

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

@@ -1121 +1121 @@
         // $ * 1.0 => $
         return a;
+      } else if (IsConstant(b) && ((ConstantTreeNode)b).Value.IsAlmost(0.0)) {
+        return MakeConstant(0);
       } else if (IsConstant(b) && IsVariableBase(a)) {
         // multiply constants into variables weights

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4.csproj

@@ -139 +139 @@
     <Compile Include="Converters\LinearModelToTreeConverter.cs" />
     <Compile Include="Converters\TreeSimplifier.cs" />
+    <Compile Include="Converters\DerivativeCalculator.cs" />
     <Compile Include="Converters\TreeToAutoDiffTermConverter.cs" />
     <Compile Include="Formatters\InfixExpressionFormatter.cs" />