Changeset 12547 for branches/DataAnalysis.ComplexityAnalyzer/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/SymbolicDataAnalysisExpressionTreeSimplifier.cs

Timestamp:

06/30/15 12:32:08 (9 years ago)

Author:

mkommend

Message:

#2175: Merged trunk changes.

Location:

branches/DataAnalysis.ComplexityAnalyzer/HeuristicLab.Problems.DataAnalysis.Symbolic

Files:

• . (modified) (1 prop)
• 3.4/SymbolicDataAnalysisExpressionTreeSimplifier.cs (modified) (9 diffs)

branches/DataAnalysis.ComplexityAnalyzer/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/SymbolicDataAnalysisExpressionTreeSimplifier.cs

@@ -287 +287 @@
         // make sum(x0..xn) / n
         var sum = original.Subtrees
-          .Select(x => GetSimplifiedTree(x))
-          .Aggregate((a, b) => MakeSum(a, b));
+          .Select(GetSimplifiedTree)
+          .Aggregate(MakeSum);
         return MakeFraction(sum, MakeConstant(original.Subtrees.Count()));
       }
@@ -299 +299 @@
         // simplify expressions x0..xn
         // make multiplication (x0 * 1/(x1 * x1 * .. * xn))
-        var simplifiedTrees = original.Subtrees.Select(GetSimplifiedTree).ToArray();
+        var first = original.GetSubtree(0);
+        var second = original.GetSubtree(1);
+        var remaining = original.Subtrees.Skip(2);
         return
-          MakeProduct(simplifiedTrees.First(), Invert(simplifiedTrees.Skip(1).Aggregate(MakeProduct)));
+          MakeProduct(GetSimplifiedTree(first), Invert(remaining.Aggregate(GetSimplifiedTree(second), (a, b) => MakeProduct(a, GetSimplifiedTree(b)))));
       }
     }
@@ -310 +312 @@
       } else {
         return original.Subtrees
-          .Select(GetSimplifiedTree).ToArray()
+          .Select(GetSimplifiedTree)
           .Aggregate(MakeProduct);
       }
@@ -321 +323 @@
         // simplify expressions x0..xn
         // make addition (x0,-x1..-xn)
-        var simplifiedTrees = original.Subtrees.Select(GetSimplifiedTree).ToArray();
-        return simplifiedTrees.Take(1)
-          .Concat(simplifiedTrees.Skip(1).Select(Negate))
-          .Aggregate(MakeSum);
+        var first = original.Subtrees.First();
+        var remaining = original.Subtrees.Skip(1);
+        return remaining.Aggregate(GetSimplifiedTree(first), (a, b) => MakeSum(a, Negate(GetSimplifiedTree(b))));
       }
     }
@@ -335 +336 @@
         // make addition (x0..xn)
         return original.Subtrees
-          .Select(GetSimplifiedTree).ToArray()
+          .Select(GetSimplifiedTree)
           .Aggregate(MakeSum);
       }
@@ -345 +346 @@
     private ISymbolicExpressionTreeNode SimplifyOr(ISymbolicExpressionTreeNode original) {
       return original.Subtrees
-        .Select(x => GetSimplifiedTree(x))
-        .Aggregate((a, b) => MakeOr(a, b));
+        .Select(GetSimplifiedTree)
+        .Aggregate(MakeOr);
     }
     private ISymbolicExpressionTreeNode SimplifyAnd(ISymbolicExpressionTreeNode original) {
       return original.Subtrees
-        .Select(x => GetSimplifiedTree(x))
-        .Aggregate((a, b) => MakeAnd(a, b));
+        .Select(GetSimplifiedTree)
+        .Aggregate(MakeAnd);
     }
     private ISymbolicExpressionTreeNode SimplifyLessThan(ISymbolicExpressionTreeNode original) {
@@ -831 +832 @@
     private void MergeVariablesInSum(ISymbolicExpressionTreeNode sum) {
       var subtrees = new List<ISymbolicExpressionTreeNode>(sum.Subtrees);
-      while (sum.Subtrees.Count() > 0) sum.RemoveSubtree(0);
+      while (sum.Subtrees.Any()) sum.RemoveSubtree(0);
       var groupedVarNodes = from node in subtrees.OfType<VariableTreeNode>()
                             let lag = (node is LaggedVariableTreeNode) ? ((LaggedVariableTreeNode)node).Lag : 0
@@ -949 +950 @@
     private void MergeVariablesAndConstantsInProduct(ISymbolicExpressionTreeNode prod) {
       var subtrees = new List<ISymbolicExpressionTreeNode>(prod.Subtrees);
-      while (prod.Subtrees.Count() > 0) prod.RemoveSubtree(0);
+      while (prod.Subtrees.Any()) prod.RemoveSubtree(0);
       var groupedVarNodes = from node in subtrees.OfType<VariableTreeNode>()
                             let lag = (node is LaggedVariableTreeNode) ? ((LaggedVariableTreeNode)node).Lag : 0
@@ -1004 +1005 @@
       } else if (IsAddition(x)) {
         // (x0 + x1 + .. + xn) * -1 => (-x0 + -x1 + .. + -xn)        
-        List<ISymbolicExpressionTreeNode> subtrees = new List<ISymbolicExpressionTreeNode>(x.Subtrees);
-        while (x.Subtrees.Count() > 0) x.RemoveSubtree(0);
+        var subtrees = new List<ISymbolicExpressionTreeNode>(x.Subtrees);
+        while (x.Subtrees.Any()) x.RemoveSubtree(0);
         foreach (var subtree in subtrees) {
           x.AddSubtree(Negate(subtree));