Changeset 12024 for branches/HeuristicLab.Problems.GrammaticalOptimization/HeuristicLab.Problems.GrammaticalOptimization.SymbReg/ExpressionCompiler.cs

Timestamp:

02/17/15 16:03:49 (9 years ago)

Author:

gkronber

Message:

#2283: changed handling of inverse expressions in transformation of expressions to canonical form

File:

• branches/HeuristicLab.Problems.GrammaticalOptimization/HeuristicLab.Problems.GrammaticalOptimization.SymbReg/ExpressionCompiler.cs (modified) (2 diffs)

branches/HeuristicLab.Problems.GrammaticalOptimization/HeuristicLab.Problems.GrammaticalOptimization.SymbReg/ExpressionCompiler.cs

@@ -95 +95 @@
       if (f != null) factors.Add(f);
       var curSy = CurSy();
-      while (curSy == '*' || curSy == '%' || curSy == '/') { // division and protected division symbols are handled in the same way
+      while (curSy == '*' || curSy == '%') { // division and protected division symbols are handled in the same way
         if (curSy == '*') {
           NewSy();
@@ -135 +135 @@
         r = variables[varIdx];
         NewSy();
-      } else if (curSy == '|') {
-        // pipe symbol is used in the expressionextender to represent constant one (|/x). 
+      } else if (curSy == '/') {
+        // /-symbol used in the expressionextender to represent inverse (1/x). 
         // this is necessary because we also use symbols 0..9 as indices for ERCs
-        r = 1.0;
         NewSy();
+        r = 1.0 / Fact(variables, constants);
       } else if (curSy >= '0' && curSy <= '9') {
         int o = (byte)curSy - (byte)'0';