Changeset 17500 for stable/HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views/3.4/InteractiveSymbolicRegressionSolutionSimplifierView.cs

Timestamp:

04/06/20 17:55:24 (4 years ago)

Author:

mkommend

Message:

#2973: Merged r17276, r17426, r17430, r17488 into stable.

Location:

stable

Files:

• . (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views (modified) (1 prop)
• HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views/3.4/InteractiveSymbolicRegressionSolutionSimplifierView.cs (modified) (2 diffs)

stable/HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views/3.4/InteractiveSymbolicRegressionSolutionSimplifierView.cs

@@ -53 +53 @@
     protected override ISymbolicExpressionTree OptimizeConstants(ISymbolicExpressionTree tree, IProgress progress) {
       const int constOptIterations = 50;
-      const int maxRepetitions = 1000;
+      const int maxRepetitions = 100;
+      const double minimumImprovement = 1e-10;
       var regressionProblemData = Content.ProblemData;
       var model = Content.Model;
       progress.CanBeStopped = true;
-      var prevResult = 0.0;
+      double prevResult = 0.0, improvement = 0.0;
       var result = 0.0;
       int reps = 0;
@@ -66 +67 @@
           applyLinearScaling: true, maxIterations: constOptIterations, updateVariableWeights: true, lowerEstimationLimit: model.LowerEstimationLimit, upperEstimationLimit: model.UpperEstimationLimit,
           iterationCallback: (args, func, obj) => {
-            double newProgressValue = progress.ProgressValue + 1.0 / (constOptIterations + 2); // (maxIterations + 2) iterations are reported
+            double newProgressValue = progress.ProgressValue + (1.0 / (constOptIterations + 2) / maxRepetitions); // (constOptIterations + 2) iterations are reported
             progress.ProgressValue = Math.Min(newProgressValue, 1.0);
           });
         reps++;
-      } while (prevResult < result && reps < maxRepetitions &&
+        improvement = result - prevResult;
+      } while (improvement > minimumImprovement && reps < maxRepetitions &&
                progress.ProgressState != ProgressState.StopRequested &&
                progress.ProgressState != ProgressState.CancelRequested);