Changeset 16905 for trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters

Timestamp:

05/07/19 14:20:33 (6 years ago)

Author:

gkronber

Message:

#2915: Corrected calculation of cuberoot function in all interpreters and updated all formatters.
I tested a run with all interpreters and got the same results with all of them.

Location:

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters

Files:

• SymbolicDataAnalysisExpressionCSharpFormatter.cs (modified) (3 diffs)
• SymbolicDataAnalysisExpressionExcelFormatter.cs (modified) (1 diff)
• SymbolicDataAnalysisExpressionLatexFormatter.cs (modified) (2 diffs)
• SymbolicDataAnalysisExpressionMATLABFormatter.cs (modified) (1 diff)
• SymbolicDataAnalysisExpressionMathematicaFormatter.cs (modified) (1 diff)
• SymbolicDataAnalysisExpressionSmalltalkFormatter.cs (modified) (1 diff)

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionCSharpFormatter.cs

@@ -140 +140 @@
           FormatPower(node, strBuilder, "3");
         } else if (node.Symbol is CubeRoot) {
-          FormatPower(node, strBuilder, "1.0/3");
+          strBuilder.Append("Cbrt(");
+          FormatRecursively(node.GetSubtree(0), strBuilder);
+          strBuilder.Append(")");
         } else if (node.Symbol is Power) {
           FormatFunction(node, "Math.Pow", strBuilder);
@@ -252 +254 @@
       strBuilder.AppendLine("public static class Model {");
       GenerateAverageSource(strBuilder);
+      GenerateCbrtSource(strBuilder);
       GenerateIfThenElseSource(strBuilder);
       GenerateFactorSource(strBuilder);
@@ -293 +296 @@
       strBuilder.AppendLine("private static double Average(params double[] values) {");
       strBuilder.AppendLine("  return values.Average();");
+      strBuilder.AppendLine("}");
+    }
+    private void GenerateCbrtSource(StringBuilder strBuilder) {
+      strBuilder.AppendLine("private static double Cbrt(double x) {");
+      strBuilder.AppendLine("  return x < 0 ? -Math.Pow(-x, 1.0 / 3.0) : Math.Pow(x, 1.0 / 3.0);");
       strBuilder.AppendLine("}");
     }

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionExcelFormatter.cs

@@ -144 +144 @@
         stringBuilder.Append($"POWER({FormatRecursively(node.GetSubtree(0))}, 3)");
       } else if (symbol is CubeRoot) {
-        stringBuilder.Append($"POWER({FormatRecursively(node.GetSubtree(0))}, 1/3)");
+        var arg_expr = FormatRecursively(node.GetSubtree(0));
+        stringBuilder.Append($"IF({arg_expr} < 0, -POWER(-{arg_expr}, 1/3), POWER({arg_expr}, 1/3))");
       } else if (symbol is Division) {
         if (node.SubtreeCount == 1) {

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionLatexFormatter.cs

@@ -138 +138 @@
         strBuilder.Append(@"\left(");
       } else if (node.Symbol is CubeRoot) {
-        strBuilder.Append(@"\left(");
+        strBuilder.Append(@"\operatorname{cbrt}\left(");
       } else if (node.Symbol is Sine) {
         strBuilder.Append(@"\sin \left( ");
@@ -420 +420 @@
         strBuilder.Append(@"\right)^3");
       } else if (node.Symbol is CubeRoot) {
-        strBuilder.Append(@"\right)^\frac{1}{3}");
+        strBuilder.Append(@"\right)");
       } else if (node.Symbol is Sine) {
         strBuilder.Append(@" \right) ");

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionMATLABFormatter.cs

@@ -188 +188 @@
         stringBuilder.Append(").^3");
       } else if (symbol is CubeRoot) {
-        stringBuilder.Append("(");
-        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
-        stringBuilder.Append(").^(1/3)");
+        stringBuilder.Append("NTHROOT(");
+        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
+        stringBuilder.Append(", 3)");
       } else if (symbol is GreaterThan) {
         stringBuilder.Append("((");

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionMathematicaFormatter.cs

@@ -115 +115 @@
           FormatPower(node, strBuilder, "3");
         } else if (node.Symbol is CubeRoot) {
-          FormatPower(node, strBuilder, "1/3");
+          strBuilder.Append("CubeRoot[");
+          FormatRecursively(node.GetSubtree(0), strBuilder);
+          strBuilder.Append("]");
         } else if (node.Symbol is Power) {
           FormatFunction(node, "Power", strBuilder);

trunk/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionSmalltalkFormatter.cs

@@ -92 +92 @@
         stringBuilder.Append(FormatPower(node.GetSubtree(0), "3"));
       } else if (symbol is CubeRoot) {
-        stringBuilder.Append(FormatPower(node.GetSubtree(0), "(1/3)"));
+        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
+        stringBuilder.Append(" cbrt");
       } else if (symbol is Division) {
         if (node.SubtreeCount == 1) {