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source: stable/HeuristicLab.Problems.DataAnalysis.Views/3.4/Regression/RegressionSolutionErrorCharacteristicsCurveView.cs @ 12702

Last change on this file since 12702 was 12668, checked in by gkronber, 9 years ago

#2369 merged r12493,r12577,r12642 from trunk to stable
File size: 10.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 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.Linq;
25using System.Windows.Forms;
26using System.Windows.Forms.DataVisualization.Charting;
27using HeuristicLab.Common;
28using HeuristicLab.MainForm;
29
30namespace HeuristicLab.Problems.DataAnalysis.Views {
31  [View("Error Characteristics Curve")]
32  [Content(typeof(IRegressionSolution))]
33  public partial class RegressionSolutionErrorCharacteristicsCurveView : DataAnalysisSolutionEvaluationView {
34    protected const string TrainingSamples = "Training";
35    protected const string TestSamples = "Test";
36    protected const string AllSamples = "All Samples";
37
38    public RegressionSolutionErrorCharacteristicsCurveView()
39      : base() {
40      InitializeComponent();
41
42      cmbSamples.Items.Add(TrainingSamples);
43      cmbSamples.Items.Add(TestSamples);
44      cmbSamples.Items.Add(AllSamples);
45
46      cmbSamples.SelectedIndex = 0;
47
48      residualComboBox.SelectedIndex = 0;
49
50      chart.CustomizeAllChartAreas();
51      chart.ChartAreas[0].AxisX.Title = residualComboBox.SelectedItem.ToString();
52      chart.ChartAreas[0].AxisX.Minimum = 0.0;
53      chart.ChartAreas[0].AxisX.Maximum = 0.0;
54      chart.ChartAreas[0].AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;
55      chart.ChartAreas[0].CursorX.Interval = 0.01;
56
57      chart.ChartAreas[0].AxisY.Title = "Ratio of Residuals";
58      chart.ChartAreas[0].AxisY.Minimum = 0.0;
59      chart.ChartAreas[0].AxisY.Maximum = 1.0;
60      chart.ChartAreas[0].AxisY.MajorGrid.Interval = 0.2;
61      chart.ChartAreas[0].CursorY.Interval = 0.01;
62    }
63
64    public new IRegressionSolution Content {
65      get { return (IRegressionSolution)base.Content; }
66      set { base.Content = value; }
67    }
68    public IRegressionProblemData ProblemData {
69      get {
70        if (Content == null) return null;
71        return Content.ProblemData;
72      }
73    }
74
75    protected override void RegisterContentEvents() {
76      base.RegisterContentEvents();
77      Content.ModelChanged += new EventHandler(Content_ModelChanged);
78      Content.ProblemDataChanged += new EventHandler(Content_ProblemDataChanged);
79    }
80    protected override void DeregisterContentEvents() {
81      base.DeregisterContentEvents();
82      Content.ModelChanged -= new EventHandler(Content_ModelChanged);
83      Content.ProblemDataChanged -= new EventHandler(Content_ProblemDataChanged);
84    }
85
86    protected virtual void Content_ModelChanged(object sender, EventArgs e) {
87      if (InvokeRequired) Invoke((Action<object, EventArgs>)Content_ModelChanged, sender, e);
88      else UpdateChart();
89    }
90    protected virtual void Content_ProblemDataChanged(object sender, EventArgs e) {
91      if (InvokeRequired) Invoke((Action<object, EventArgs>)Content_ProblemDataChanged, sender, e);
92      else {
93        UpdateChart();
94      }
95    }
96    protected override void OnContentChanged() {
97      base.OnContentChanged();
98      UpdateChart();
99    }
100
101    protected virtual void UpdateChart() {
102      chart.Series.Clear();
103      chart.Annotations.Clear();
104      chart.ChartAreas[0].AxisX.Maximum = 0.0;
105      chart.ChartAreas[0].CursorX.Interval = 0.01;
106
107      if (Content == null) return;
108      if (cmbSamples.SelectedItem.ToString() == TrainingSamples && !ProblemData.TrainingIndices.Any()) return;
109      if (cmbSamples.SelectedItem.ToString() == TestSamples && !ProblemData.TestIndices.Any()) return;
110
111      if (Content.ProblemData.TrainingIndices.Any()) {
112        AddRegressionSolution(CreateConstantSolution());
113      }
114
115      AddRegressionSolution(Content);
116
117      chart.ChartAreas[0].AxisX.Title = residualComboBox.SelectedItem.ToString();
118    }
119
120    protected void AddRegressionSolution(IRegressionSolution solution) {
121      if (chart.Series.Any(s => s.Name == solution.Name)) return;
122
123      Series solutionSeries = new Series(solution.Name);
124      solutionSeries.Tag = solution;
125      solutionSeries.ChartType = SeriesChartType.FastLine;
126      var residuals = GetResiduals(GetOriginalValues(), GetEstimatedValues(solution));
127
128      var maxValue = residuals.Max();
129      if (maxValue >= chart.ChartAreas[0].AxisX.Maximum) {
130        double scale = Math.Pow(10, Math.Floor(Math.Log10(maxValue)));
131        var maximum = scale * (1 + (int)(maxValue / scale));
132        chart.ChartAreas[0].AxisX.Maximum = maximum;
133        chart.ChartAreas[0].CursorX.Interval = residuals.Min() / 100;
134      }
135
136      UpdateSeries(residuals, solutionSeries);
137
138      solutionSeries.ToolTip = "Area over Curve: " + CalculateAreaOverCurve(solutionSeries);
139      solutionSeries.LegendToolTip = "Double-click to open model";
140      chart.Series.Add(solutionSeries);
141    }
142
143    protected void UpdateSeries(List<double> residuals, Series series) {
144      series.Points.Clear();
145      residuals.Sort();
146      if (!residuals.Any() || residuals.All(double.IsNaN)) return;
147
148      series.Points.AddXY(0, 0);
149      for (int i = 0; i < residuals.Count; i++) {
150        var point = new DataPoint();
151        if (residuals[i] > chart.ChartAreas[0].AxisX.Maximum) {
152          point.XValue = chart.ChartAreas[0].AxisX.Maximum;
153          point.YValues[0] = ((double)i) / residuals.Count;
154          point.ToolTip = "Error: " + point.XValue + "\n" + "Samples: " + point.YValues[0];
155          series.Points.Add(point);
156          break;
157        }
158
159        point.XValue = residuals[i];
160        point.YValues[0] = ((double)i + 1) / residuals.Count;
161        point.ToolTip = "Error: " + point.XValue + "\n" + "Samples: " + point.YValues[0];
162        series.Points.Add(point);
163      }
164
165      if (series.Points.Last().XValue < chart.ChartAreas[0].AxisX.Maximum) {
166        var point = new DataPoint();
167        point.XValue = chart.ChartAreas[0].AxisX.Maximum;
168        point.YValues[0] = 1;
169        point.ToolTip = "Error: " + point.XValue + "\n" + "Samples: " + point.YValues[0];
170        series.Points.Add(point);
171      }
172    }
173
174    protected IEnumerable<double> GetOriginalValues() {
175      IEnumerable<double> originalValues;
176      switch (cmbSamples.SelectedItem.ToString()) {
177        case TrainingSamples:
178          originalValues = ProblemData.Dataset.GetDoubleValues(ProblemData.TargetVariable, ProblemData.TrainingIndices);
179          break;
180        case TestSamples:
181          originalValues = ProblemData.Dataset.GetDoubleValues(ProblemData.TargetVariable, ProblemData.TestIndices);
182          break;
183        case AllSamples:
184          originalValues = ProblemData.Dataset.GetDoubleValues(ProblemData.TargetVariable);
185          break;
186        default:
187          throw new NotSupportedException();
188      }
189      return originalValues;
190    }
191
192    protected IEnumerable<double> GetEstimatedValues(IRegressionSolution solution) {
193      IEnumerable<double> estimatedValues;
194      switch (cmbSamples.SelectedItem.ToString()) {
195        case TrainingSamples:
196          estimatedValues = solution.EstimatedTrainingValues;
197          break;
198        case TestSamples:
199          estimatedValues = solution.EstimatedTestValues;
200          break;
201        case AllSamples:
202          estimatedValues = solution.EstimatedValues;
203          break;
204        default:
205          throw new NotSupportedException();
206      }
207      return estimatedValues;
208    }
209
210    protected virtual List<double> GetResiduals(IEnumerable<double> originalValues, IEnumerable<double> estimatedValues) {
211      switch (residualComboBox.SelectedItem.ToString()) {
212        case "Absolute error": return originalValues.Zip(estimatedValues, (x, y) => Math.Abs(x - y)).ToList();
213        case "Squared error": return originalValues.Zip(estimatedValues, (x, y) => (x - y) * (x - y)).ToList();
214        case "Relative error": return originalValues.Zip(estimatedValues, (x, y) => x.IsAlmost(0.0) ? -1 : Math.Abs((x - y) / x))
215          .Where(x => x > 0) // remove entries where the original value is 0
216          .ToList();
217        default: throw new NotSupportedException();
218      }
219    }
220
221    private double CalculateAreaOverCurve(Series series) {
222      if (series.Points.Count < 1) return 0;
223
224      double auc = 0.0;
225      for (int i = 1; i < series.Points.Count; i++) {
226        double width = series.Points[i].XValue - series.Points[i - 1].XValue;
227        double y1 = 1 - series.Points[i - 1].YValues[0];
228        double y2 = 1 - series.Points[i].YValues[0];
229
230        auc += (y1 + y2) * width / 2;
231      }
232
233      return auc;
234    }
235
236    protected void cmbSamples_SelectedIndexChanged(object sender, EventArgs e) {
237      if (InvokeRequired) Invoke((Action<object, EventArgs>)cmbSamples_SelectedIndexChanged, sender, e);
238      else UpdateChart();
239    }
240
241    #region Baseline
242    private void Chart_MouseDoubleClick(object sender, MouseEventArgs e) {
243      HitTestResult result = chart.HitTest(e.X, e.Y);
244      if (result.ChartElementType != ChartElementType.LegendItem) return;
245
246      MainFormManager.MainForm.ShowContent((IRegressionSolution)result.Series.Tag);
247    }
248
249    private ConstantRegressionSolution CreateConstantSolution() {
250      double averageTrainingTarget = ProblemData.Dataset.GetDoubleValues(ProblemData.TargetVariable, ProblemData.TrainingIndices).Average();
251      var model = new ConstantRegressionModel(averageTrainingTarget);
252      var solution = new ConstantRegressionSolution(model, (IRegressionProblemData)ProblemData.Clone());
253      solution.Name = "Baseline";
254      return solution;
255    }
256    #endregion
257
258    private void chart_MouseMove(object sender, MouseEventArgs e) {
259      HitTestResult result = chart.HitTest(e.X, e.Y);
260      if (result.ChartElementType == ChartElementType.LegendItem) {
261        Cursor = Cursors.Hand;
262      } else {
263        Cursor = Cursors.Default;
264      }
265    }
266
267    private void residualComboBox_SelectedIndexChanged(object sender, EventArgs e) {
268      UpdateChart();
269    }
270  }
271}
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