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source: trunk/sources/HeuristicLab.Problems.DataAnalysis.Views/3.4/Controls/DensityChart.cs @ 14099

Last change on this file since 14099 was 14099, checked in by pfleck, 8 years ago

#2597:

  • Renamed IConfidenceBoundRegressionModel/Solution+Views to IConfidenceRegressionModel/Solution+Views.
  • Moved IConfidenceRegressionModel and IConfidenceRegressionSolution into own files.
  • Moved some (helper) controls into separate sub folder.
  • Fixed typo.
File size: 2.5 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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 System.Linq;
24using System.Windows.Forms;
25
26namespace HeuristicLab.Problems.DataAnalysis.Views {
27  public partial class DensityChart : UserControl {
28    public DensityChart() {
29      InitializeComponent();
30    }
31
32    public void UpdateChart(IList<double> data, double min, double max, int numBuckets, double minimumHeight = 0.1) {
33      if (data == null || numBuckets < 0 || min > max || max < min)
34        return;
35
36      var buckets = CalculateBuckets(data, numBuckets, min, max);
37
38      // set minimum height of all non-zero buckets on 10% of maximum
39      double minHeight = buckets.Max() * 0.1;
40      for (int i = 0; i < buckets.Length; i++) {
41        if (buckets[i] >= 1 && buckets[i] < minHeight)
42          buckets[i] = minHeight;
43      }
44
45      var points = chart.Series[0].Points;
46      if (points.Count == buckets.Length) {
47        for (int i = 0; i < buckets.Length; i++)
48          points[i].SetValueY(buckets[i]);
49        chart.ChartAreas[0].RecalculateAxesScale();
50        chart.Refresh();
51      } else {
52        chart.Series[0].Points.DataBindY(buckets);
53      }
54    }
55
56    private double[] CalculateBuckets(IList<double> data, int numBuckets, double min, double max) {
57      var buckets = new double[numBuckets];
58      var bucketSize = (max - min) / numBuckets;
59      if (bucketSize > 0.0) {
60        for (int i = 0; i < data.Count; i++) {
61          int bucketIndex = (int)((data[i] - min) / bucketSize);
62          if (bucketIndex == numBuckets) {
63            bucketIndex--;
64          }
65          if (bucketIndex >= 0 && bucketIndex < buckets.Length)
66            buckets[bucketIndex] += 1.0;
67        }
68      }
69      return buckets;
70    }
71  }
72}
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