Changeset 10774 for trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/SymbolicDataAnalysisExpressionTreeInterpreter.cs

Timestamp:

04/23/14 13:12:07 (10 years ago)

Author:

mkommend

Message:

#2177: Implemented XOR symbol and adapted the interpreters and grammars.

File:

• trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/SymbolicDataAnalysisExpressionTreeInterpreter.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Interpreter/SymbolicDataAnalysisExpressionTreeInterpreter.cs

@@ -344 +344 @@
             return Evaluate(dataset, ref row, state) > 0.0 ? -1.0 : 1.0;
           }
+        case OpCodes.XOR: {
+            double firstArgument = Evaluate(dataset, ref row, state);
+            double result = 1.0;
+            for (int i = 1; i < currentInstr.nArguments; i++) {
+              if (result <= 0.0) {
+                state.SkipInstructions();
+              } else {
+                double evalutationResult = Evaluate(dataset, ref row, state);
+                if (firstArgument <= 0 && evalutationResult > 0) result = -1.0;
+                else if (firstArgument > 0 && evalutationResult <= 0) result = -1.0;
+              }
+            }
+            return result > 0.0 ? 1.0 : -1.0;
+          }
         case OpCodes.GT: {
             double x = Evaluate(dataset, ref row, state);