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source: branches/HeuristicLab.Hive_Milestone3/sources/HeuristicLab.Modeling/3.2/VariableEvaluationImpactCalculator.cs @ 3155

Last change on this file since 3155 was 2043, checked in by gkronber, 15 years ago

Added variable impact calculation operators for support vector machines. #644 (Variable impact of CEDMA models should be calculated and stored in the result DB)

File size: 2.7 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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;
23using System.Collections.Generic;
24using System.Text;
25using System.Xml;
26using HeuristicLab.Core;
27using HeuristicLab.Data;
28using HeuristicLab.DataAnalysis;
29using System.Linq;
30
31namespace HeuristicLab.Modeling {
32  public abstract class VariableEvaluationImpactCalculator : VariableImpactCalculatorBase<double[]> {
33    public override string OutputVariableName {
34      get { return "VariableEvaluationImpacts"; }
35    }
36
37    public override string Description {
38      get { return @"Calculates the impact of all allowed input variables on the model outputs using evaluator supplied as suboperator."; }
39    }
40
41    private double[,] CombineOutputs(double[] referenceOutputs, double[] newOutputs) {
42      if (referenceOutputs.Length != newOutputs.Length) throw new InvalidProgramException();
43      double[,] result = new double[referenceOutputs.Length, 2];
44      for (int i = 0; i < referenceOutputs.Length; i++) {
45        result[i, 0] = referenceOutputs[i];
46        result[i, 1] = newOutputs[i];
47      }
48      return result;
49    }
50
51    protected override double CalculateImpact(double[] referenceValue, double[] newValue) {
52      return SimpleMSEEvaluator.Calculate(CombineOutputs(referenceValue, newValue));
53    }
54
55    protected override double[] CalculateValue(IScope scope, Dataset dataset, int targetVariable, ItemList<IntData> allowedFeatures, int start, int end) {
56      return GetOutputs(scope, dataset, targetVariable, allowedFeatures, start, end);
57    }
58
59    protected override double[] PostProcessImpacts(double[] impacts) {
60      double mseSum = impacts.Sum();
61      if (mseSum == 0.0) mseSum = 1.0;
62      for (int i = 0; i < impacts.Length; i++) {
63        impacts[i] = impacts[i] / mseSum;
64      }
65      return impacts;
66    }
67
68    protected abstract double[] GetOutputs(IScope scope, Dataset dataset, int targetVariable, ItemList<IntData> allowedFeatures, int start, int end);
69  }
70}
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