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source: trunk/HeuristicLab.Problems.DataAnalysis.Symbolic.Classification/3.4/SymbolicClassificationSolutionImpactValuesCalculator.cs @ 15871

Last change on this file since 15871 was 15871, checked in by mkommend, 6 years ago

#2910: Added recalculation of thresholds for IDiscriminantClassificationModels during impact calculation.

File size: 2.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
26
27namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Classification {
28  [StorableClass]
29  [Item("SymbolicClassificationSolutionImpactValuesCalculator", "Calculate symbolic expression tree node impact values for classification problems.")]
30  public class SymbolicClassificationSolutionImpactValuesCalculator : SymbolicDataAnalysisSolutionImpactValuesCalculator {
31    public SymbolicClassificationSolutionImpactValuesCalculator() { }
32    protected SymbolicClassificationSolutionImpactValuesCalculator(SymbolicClassificationSolutionImpactValuesCalculator original, Cloner cloner)
33      : base(original, cloner) { }
34    public override IDeepCloneable Clone(Cloner cloner) {
35      return new SymbolicClassificationSolutionImpactValuesCalculator(this, cloner);
36    }
37    [StorableConstructor]
38    protected SymbolicClassificationSolutionImpactValuesCalculator(bool deserializing) : base(deserializing) { }
39
40    protected override double CalculateQualityForImpacts(ISymbolicDataAnalysisModel model, IDataAnalysisProblemData problemData, IEnumerable<int> rows) {
41      var classificationModel = (ISymbolicClassificationModel)model;
42      var classificationProblemData = (IClassificationProblemData)problemData;
43      OnlineCalculatorError errorState;
44      var dataset = problemData.Dataset;
45      classificationModel.RecalculateModelParameters(classificationProblemData, rows);
46      var targetClassValues = dataset.GetDoubleValues(classificationProblemData.TargetVariable, rows);
47      var originalClassValues = classificationModel.GetEstimatedClassValues(dataset, rows);
48      var qualityForImpactsCalculation = OnlineAccuracyCalculator.Calculate(targetClassValues, originalClassValues, out errorState);
49      if (errorState != OnlineCalculatorError.None) qualityForImpactsCalculation = 0.0;
50      return qualityForImpactsCalculation;
51    }
52  }
53}
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