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source: trunk/HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views/3.4/InteractiveSymbolicRegressionSolutionSimplifierView.cs @ 17403

Last change on this file since 17403 was 17380, checked in by pfleck, 5 years ago

#3042 Moved code for enabling/disabling the Optimize-Button to SetEnabledStateOfControls and called SetEnabledStateOfControls after the Model is changed.

File size: 3.5 KB
RevLine 
[3915]1#region License Information
2/* HeuristicLab
[17180]3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[3915]4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
[6256]23using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
[15371]24using HeuristicLab.MainForm;
[5699]25using HeuristicLab.Problems.DataAnalysis.Symbolic.Views;
[3915]26
[5699]27namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Regression.Views {
28  public partial class InteractiveSymbolicRegressionSolutionSimplifierView : InteractiveSymbolicDataAnalysisSolutionSimplifierView {
[5717]29    public new SymbolicRegressionSolution Content {
30      get { return (SymbolicRegressionSolution)base.Content; }
31      set { base.Content = value; }
32    }
33
[5699]34    public InteractiveSymbolicRegressionSolutionSimplifierView()
[15371]35      : base(new SymbolicRegressionSolutionImpactValuesCalculator()) {
[5699]36      InitializeComponent();
37      this.Caption = "Interactive Regression Solution Simplifier";
[3915]38    }
39
[17380]40    protected override void SetEnabledStateOfControls() {
41      base.SetEnabledStateOfControls();
42
43      var tree = Content?.Model?.SymbolicExpressionTree;
44      btnOptimizeConstants.Enabled = tree != null && SymbolicRegressionConstantOptimizationEvaluator.CanOptimizeConstants(tree);
45    }
46
[5717]47    protected override void UpdateModel(ISymbolicExpressionTree tree) {
[13941]48      var model = new SymbolicRegressionModel(Content.ProblemData.TargetVariable, tree, Content.Model.Interpreter, Content.Model.LowerEstimationLimit, Content.Model.UpperEstimationLimit);
[8972]49      model.Scale(Content.ProblemData);
[5818]50      Content.Model = model;
[3915]51    }
52
[15400]53    protected override ISymbolicExpressionTree OptimizeConstants(ISymbolicExpressionTree tree, IProgress progress) {
[15371]54      const int constOptIterations = 50;
[16798]55      const int maxRepetitions = 1000;
[15400]56      var regressionProblemData = Content.ProblemData;
57      var model = Content.Model;
[16798]58      progress.CanBeStopped = true;
59      var prevResult = 0.0;
60      var result = 0.0;
61      int reps = 0;
62
63      do {
64        prevResult = result;
65        result = SymbolicRegressionConstantOptimizationEvaluator.OptimizeConstants(model.Interpreter, tree, regressionProblemData, regressionProblemData.TrainingIndices,
66          applyLinearScaling: true, maxIterations: constOptIterations, updateVariableWeights: true, lowerEstimationLimit: model.LowerEstimationLimit, upperEstimationLimit: model.UpperEstimationLimit,
67          iterationCallback: (args, func, obj) => {
68            double newProgressValue = progress.ProgressValue + 1.0 / (constOptIterations + 2); // (maxIterations + 2) iterations are reported
69            progress.ProgressValue = Math.Min(newProgressValue, 1.0);
70          });
71        reps++;
72      } while (prevResult < result && reps < maxRepetitions &&
73               progress.ProgressState != ProgressState.StopRequested &&
74               progress.ProgressState != ProgressState.CancelRequested);
[15400]75      return tree;
[10492]76    }
[3915]77  }
78}
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