[11610] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[12012] | 3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[11610] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Drawing;
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| 25 | using System.Linq;
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| 26 | using System.Windows.Forms;
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| 27 | using System.Windows.Forms.DataVisualization.Charting;
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| 28 | using HeuristicLab.Analysis.Statistics;
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| 29 |
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| 30 | namespace HeuristicLab.Analysis.Views {
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| 31 | public partial class HistogramControl : UserControl {
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| 32 | protected static readonly string SeriesName = "Histogram";
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[12143] | 33 | protected static readonly decimal bandwidthMin = 0.0000000000001m;
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[11610] | 34 | protected Dictionary<string, List<double>> points;
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[12143] | 35 | protected bool suppressUpdate;
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[12139] | 36 |
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[11610] | 37 | public int NumberOfBins {
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| 38 | get { return (int)binsNumericUpDown.Value; }
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| 39 | set { binsNumericUpDown.Value = value; }
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| 40 | }
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| 41 |
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| 42 | public int MinimumNumberOfBins {
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| 43 | get { return (int)binsNumericUpDown.Minimum; }
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| 44 | set { binsNumericUpDown.Minimum = value; }
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| 45 | }
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| 46 |
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| 47 | public int MaximumNumberOfBins {
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| 48 | get { return (int)binsNumericUpDown.Maximum; }
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| 49 | set { binsNumericUpDown.Maximum = value; }
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| 50 | }
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| 51 |
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| 52 | public int IncrementNumberOfBins {
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| 53 | get { return (int)binsNumericUpDown.Increment; }
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| 54 | set { binsNumericUpDown.Increment = value; }
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| 55 | }
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| 56 |
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| 57 | public bool CalculateExactBins {
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| 58 | get { return exactCheckBox.Checked; }
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| 59 | set { exactCheckBox.Checked = value; }
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| 60 | }
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| 61 |
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| 62 | public bool ShowExactCheckbox {
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| 63 | get { return exactCheckBox.Visible; }
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| 64 | set { exactCheckBox.Visible = value; }
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| 65 | }
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| 66 |
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| 67 | public HistogramControl() {
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| 68 | InitializeComponent();
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| 69 | points = new Dictionary<string, List<double>>();
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| 70 | }
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| 71 |
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| 72 | protected void InitNewRow(string name) {
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| 73 | if (!points.ContainsKey(name)) {
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| 74 | points.Add(name, new List<double>());
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| 75 | }
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| 76 | }
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| 77 |
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| 78 | protected void InitSeries(string name) {
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| 79 | if (!chart.Series.Any(x => x.Name == name)) {
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| 80 | Series s = chart.Series.Add(name);
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| 81 | s.ChartType = SeriesChartType.Column;
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| 82 | s.BorderColor = Color.Black;
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| 83 | s.BorderWidth = 1;
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| 84 | s.BorderDashStyle = ChartDashStyle.Solid;
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | public void AddPoint(double point) {
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| 89 | InitNewRow(SeriesName);
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| 90 | InitSeries(SeriesName);
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| 91 | points[SeriesName].Add(point);
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| 92 | UpdateHistogram();
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| 93 | }
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| 94 |
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| 95 | public void AddPoints(IEnumerable<double> points) {
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| 96 | InitNewRow(SeriesName);
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| 97 | InitSeries(SeriesName);
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| 98 | this.points[SeriesName].AddRange(points);
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| 99 | UpdateHistogram();
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| 100 | }
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| 101 |
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| 102 | public void AddPoint(string name, double point, bool replace = false) {
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| 103 | InitNewRow(name);
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| 104 | InitSeries(name);
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| 105 | if (replace) {
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| 106 | points[name].Clear();
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| 107 | }
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| 108 | points[name].Add(point);
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| 109 | UpdateHistogram();
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| 110 | }
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| 111 |
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| 112 | public void AddPoints(string name, IEnumerable<double> points, bool replace = false) {
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| 113 | InitNewRow(name);
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| 114 | InitSeries(name);
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| 115 | if (replace) {
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| 116 | this.points[name].Clear();
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| 117 | }
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| 118 | this.points[name].AddRange(points);
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| 119 | UpdateHistogram();
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| 120 | }
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| 121 |
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| 122 | public void ClearPoints() {
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| 123 | points.Clear();
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| 124 | UpdateHistogram();
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| 125 | }
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| 126 |
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[12139] | 127 | protected void UpdateHistogram(double bandwith = double.NaN) {
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[11610] | 128 | if (InvokeRequired) {
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[12139] | 129 | Invoke((Action<double>)UpdateHistogram, bandwith);
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[11610] | 130 | return;
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| 131 | }
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| 132 |
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| 133 | double overallMin = double.MaxValue;
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| 134 | double overallMax = double.MinValue;
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| 135 | int bins = (int)binsNumericUpDown.Value;
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| 136 |
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| 137 | chart.Series.Clear();
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| 138 | foreach (var point in points) {
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| 139 | if (!point.Value.Any()) continue;
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| 140 |
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| 141 | double minValue = point.Value.Min();
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| 142 | double maxValue = point.Value.Max();
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| 143 | double intervalWidth = (maxValue - minValue) / bins;
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| 144 | if (intervalWidth <= 0) continue;
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| 145 |
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[12467] | 146 | Series histogramSeries = new Series(point.Key);
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| 147 | chart.Series.Add(histogramSeries);
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| 148 |
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[11610] | 149 | if (!exactCheckBox.Checked) {
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| 150 | intervalWidth = HumanRoundRange(intervalWidth);
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| 151 | minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
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| 152 | maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
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| 153 | }
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| 154 |
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| 155 | double current = minValue, intervalCenter = intervalWidth / 2.0;
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| 156 | int count = 0;
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| 157 | foreach (double v in point.Value.OrderBy(x => x)) {
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| 158 | while (v > current + intervalWidth) {
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| 159 | histogramSeries.Points.AddXY(current + intervalCenter, count);
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| 160 | current += intervalWidth;
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| 161 | count = 0;
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| 162 | }
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| 163 | count++;
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| 164 | }
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| 165 | histogramSeries.Points.AddXY(current + intervalCenter, count);
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| 166 | histogramSeries["PointWidth"] = "1";
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| 167 |
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| 168 | overallMax = Math.Max(overallMax, maxValue);
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| 169 | overallMin = Math.Min(overallMin, minValue);
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| 170 |
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[12173] | 171 | chart.ApplyPaletteColors();
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[12145] | 172 | CalculateDensity(histogramSeries, point.Value, bandwith);
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| 173 | }
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| 174 |
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[12467] | 175 | if (chart.Series.Any()) {
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| 176 | noDataLabel.Visible = false;
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| 177 | } else {
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| 178 | noDataLabel.Visible = true;
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| 179 | }
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| 180 |
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[11610] | 181 | ChartArea chartArea = chart.ChartAreas[0];
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[12134] | 182 | // don't show grid lines for second y-axis
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| 183 | chartArea.AxisY2.MajorGrid.Enabled = false;
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| 184 | chartArea.AxisY2.MinorGrid.Enabled = false;
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[11610] | 185 | chartArea.AxisY.Title = "Frequency";
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| 186 |
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| 187 | double overallIntervalWidth = (overallMax - overallMin) / bins;
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| 188 | double axisInterval = overallIntervalWidth;
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| 189 | while ((overallMax - overallMin) / axisInterval > 10.0) {
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| 190 | axisInterval *= 2.0;
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| 191 | }
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| 192 | chartArea.AxisX.Interval = axisInterval;
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| 193 | }
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| 194 |
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[12139] | 195 | protected void CalculateDensity(Series series, List<double> row, double bandwidth = double.NaN) {
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[11610] | 196 | string densitySeriesName = "Density " + series.Name;
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| 197 | double stepWidth = series.Points[1].XValue - series.Points[0].XValue;
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[12139] | 198 | var rowArray = row.ToArray();
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[11610] | 199 |
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| 200 | if (chart.Series.Any(x => x.Name == densitySeriesName)) {
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| 201 | var ds = chart.Series.Single(x => x.Name == densitySeriesName);
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| 202 | chart.Series.Remove(ds);
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| 203 | }
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| 204 |
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[12139] | 205 | if (double.IsNaN(bandwidth)) {
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| 206 | bandwidth = KernelDensityEstimator.EstimateBandwidth(rowArray);
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[12143] | 207 | decimal bwDecimal = (decimal)bandwidth;
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| 208 | if (bwDecimal < bandwidthMin) {
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| 209 | bwDecimal = bandwidthMin;
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| 210 | bandwidth = decimal.ToDouble(bwDecimal);
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| 211 | }
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[12139] | 212 | suppressUpdate = true;
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[12143] | 213 | bandwidthNumericUpDown.Value = bwDecimal;
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[12139] | 214 | }
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| 215 | var density = KernelDensityEstimator.Density(rowArray, rowArray.Length, stepWidth, bandwidth);
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[11610] | 216 |
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| 217 | Series newSeries = new Series(densitySeriesName);
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[12145] | 218 | newSeries.Color = series.Color;
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[11610] | 219 | newSeries.ChartType = SeriesChartType.FastLine;
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| 220 | newSeries.BorderWidth = 2;
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| 221 | foreach (var d in density) {
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| 222 | newSeries.Points.Add(new DataPoint(d.Item1, d.Item2));
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| 223 | }
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| 224 |
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[12134] | 225 | // densities should be plotted on the second axis (different scale)
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| 226 | newSeries.YAxisType = AxisType.Secondary;
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[11610] | 227 | chart.Series.Add(newSeries);
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| 228 | }
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| 229 |
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| 230 | protected double HumanRoundRange(double range) {
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| 231 | double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
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| 232 | double rounding = range / base10;
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| 233 | if (rounding <= 1.5) rounding = 1;
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| 234 | else if (rounding <= 2.25) rounding = 2;
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| 235 | else if (rounding <= 3.75) rounding = 2.5;
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| 236 | else if (rounding <= 7.5) rounding = 5;
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| 237 | else rounding = 10;
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| 238 | return rounding * base10;
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| 239 | }
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| 240 |
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| 241 | private void binsNumericUpDown_ValueChanged(object sender, EventArgs e) {
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| 242 | UpdateHistogram();
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| 243 | }
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| 244 |
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| 245 | private void exactCheckBox_CheckedChanged(object sender, EventArgs e) {
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| 246 | UpdateHistogram();
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| 247 | }
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[12139] | 248 |
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[12140] | 249 | private void bandwidthNumericUpDown_ValueChanged(object sender, EventArgs e) {
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[12139] | 250 | if (!suppressUpdate) {
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[12140] | 251 | UpdateHistogram(decimal.ToDouble(bandwidthNumericUpDown.Value));
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[12139] | 252 | }
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| 253 | suppressUpdate = false;
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| 254 | }
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[11610] | 255 | }
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| 256 | }
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