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 |
|
---|
22 | using System;
|
---|
23 | using System.Collections.Generic;
|
---|
24 | using System.ComponentModel;
|
---|
25 | using System.Linq;
|
---|
26 | using HeuristicLab.MainForm;
|
---|
27 | using HeuristicLab.PluginInfrastructure;
|
---|
28 |
|
---|
29 | namespace HeuristicLab.Problems.DataAnalysis.Views {
|
---|
30 | [NonDiscoverableType]
|
---|
31 | public class FeatureCorrelationCalculator : Object {
|
---|
32 |
|
---|
33 | private BackgroundWorker bw;
|
---|
34 | private BackgroundWorkerInfo bwInfo;
|
---|
35 |
|
---|
36 | private IDataAnalysisProblemData problemData;
|
---|
37 | public IDataAnalysisProblemData ProblemData {
|
---|
38 | set {
|
---|
39 | if (bw != null) {
|
---|
40 | bw.CancelAsync();
|
---|
41 | }
|
---|
42 | problemData = value;
|
---|
43 | }
|
---|
44 | }
|
---|
45 |
|
---|
46 | public FeatureCorrelationCalculator()
|
---|
47 | : base() { }
|
---|
48 |
|
---|
49 | public FeatureCorrelationCalculator(IDataAnalysisProblemData problemData)
|
---|
50 | : base() {
|
---|
51 | this.problemData = problemData;
|
---|
52 | }
|
---|
53 |
|
---|
54 | public void CalculateElements(IDependencyCalculator calc, string partition) {
|
---|
55 | CalculateElements(problemData.Dataset, calc, partition);
|
---|
56 | }
|
---|
57 |
|
---|
58 | // returns true if any calculation takes place
|
---|
59 | public bool CalculateTimeframeElements(IDependencyCalculator calc, string partition, string variable, int frames, double[,] correlation = null) {
|
---|
60 | if (correlation == null || correlation.GetLength(1) <= frames) {
|
---|
61 | CalculateElements(problemData.Dataset, calc, partition, variable, frames, correlation);
|
---|
62 | return true;
|
---|
63 | } else {
|
---|
64 | return false;
|
---|
65 | }
|
---|
66 | }
|
---|
67 |
|
---|
68 | public void TryCancelCalculation() {
|
---|
69 | if (bw != null && bw.IsBusy) {
|
---|
70 | bwInfo = null;
|
---|
71 | bw.CancelAsync();
|
---|
72 | }
|
---|
73 | }
|
---|
74 |
|
---|
75 | private void CalculateElements(IDataset dataset, IDependencyCalculator calc, string partition, string variable = null, int frames = 0, double[,] alreadyCalculated = null) {
|
---|
76 | var indices = GetRelevantIndices(problemData, partition);
|
---|
77 | bwInfo = new BackgroundWorkerInfo {
|
---|
78 | Dataset = dataset, Calculator = calc, Partition = partition, Indices = indices,
|
---|
79 | Variable = variable, Frames = frames, AlreadyCalculated = alreadyCalculated
|
---|
80 | };
|
---|
81 | if (bw == null) {
|
---|
82 | bw = new BackgroundWorker();
|
---|
83 | bw.WorkerReportsProgress = true;
|
---|
84 | bw.WorkerSupportsCancellation = true;
|
---|
85 | bw.DoWork += new DoWorkEventHandler(BwDoWork);
|
---|
86 | bw.ProgressChanged += new ProgressChangedEventHandler(BwProgressChanged);
|
---|
87 | bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(BwRunWorkerCompleted);
|
---|
88 | }
|
---|
89 | if (bw.IsBusy) {
|
---|
90 | bw.CancelAsync();
|
---|
91 | } else {
|
---|
92 | bw.RunWorkerAsync(bwInfo);
|
---|
93 | }
|
---|
94 | }
|
---|
95 |
|
---|
96 | private IEnumerable<int> GetRelevantIndices(IDataAnalysisProblemData problemData, string partition) {
|
---|
97 | IEnumerable<int> var;
|
---|
98 | if (partition.Equals(AbstractFeatureCorrelationView.TRAININGSAMPLES))
|
---|
99 | var = problemData.TrainingIndices;
|
---|
100 | else if (partition.Equals(AbstractFeatureCorrelationView.TESTSAMPLES))
|
---|
101 | var = problemData.TestIndices;
|
---|
102 | else var = Enumerable.Range(0, problemData.Dataset.Rows);
|
---|
103 | return var;
|
---|
104 | }
|
---|
105 |
|
---|
106 | #region backgroundworker
|
---|
107 | private void BwDoWork(object sender, DoWorkEventArgs e) {
|
---|
108 | BackgroundWorkerInfo bwInfo = (BackgroundWorkerInfo)e.Argument;
|
---|
109 | if (bwInfo.Variable == null) {
|
---|
110 | BwCalculateCorrelation(sender, e);
|
---|
111 | } else {
|
---|
112 | BwCalculateTimeframeCorrelation(sender, e);
|
---|
113 | }
|
---|
114 | }
|
---|
115 |
|
---|
116 | private void BwCalculateCorrelation(object sender, DoWorkEventArgs e) {
|
---|
117 | BackgroundWorker worker = sender as BackgroundWorker;
|
---|
118 |
|
---|
119 | BackgroundWorkerInfo bwInfo = (BackgroundWorkerInfo)e.Argument;
|
---|
120 | var dataset = bwInfo.Dataset;
|
---|
121 | IEnumerable<int> indices = bwInfo.Indices;
|
---|
122 | IDependencyCalculator calc = bwInfo.Calculator;
|
---|
123 |
|
---|
124 | IList<string> doubleVariableNames = dataset.DoubleVariables.ToList();
|
---|
125 | OnlineCalculatorError error = OnlineCalculatorError.None;
|
---|
126 | int length = doubleVariableNames.Count;
|
---|
127 | double[,] elements = new double[length, length];
|
---|
128 | double calculations = (Math.Pow(length, 2) + length) / 2;
|
---|
129 |
|
---|
130 | worker.ReportProgress(0);
|
---|
131 |
|
---|
132 | for (int i = 0; i < length; i++) {
|
---|
133 | for (int j = 0; j < i + 1; j++) {
|
---|
134 | if (worker.CancellationPending) {
|
---|
135 | worker.ReportProgress(100);
|
---|
136 | e.Cancel = true;
|
---|
137 | return;
|
---|
138 | }
|
---|
139 | IEnumerable<double> var1 = problemData.Dataset.GetDoubleValues(doubleVariableNames[i], indices);
|
---|
140 | IEnumerable<double> var2 = problemData.Dataset.GetDoubleValues(doubleVariableNames[j], indices);
|
---|
141 |
|
---|
142 | elements[i, j] = calc.Calculate(var1, var2, out error);
|
---|
143 |
|
---|
144 | if (!error.Equals(OnlineCalculatorError.None)) {
|
---|
145 | elements[i, j] = double.NaN;
|
---|
146 | }
|
---|
147 | elements[j, i] = elements[i, j];
|
---|
148 | worker.ReportProgress((int)Math.Round((((Math.Pow(i, 2) + i) / 2 + j + 1.0) / calculations) * 100));
|
---|
149 | }
|
---|
150 | }
|
---|
151 | e.Result = elements;
|
---|
152 | worker.ReportProgress(100);
|
---|
153 | }
|
---|
154 |
|
---|
155 | private void BwCalculateTimeframeCorrelation(object sender, DoWorkEventArgs e) {
|
---|
156 | BackgroundWorker worker = sender as BackgroundWorker;
|
---|
157 |
|
---|
158 | BackgroundWorkerInfo bwInfo = (BackgroundWorkerInfo)e.Argument;
|
---|
159 | var dataset = bwInfo.Dataset;
|
---|
160 | IEnumerable<int> indices = bwInfo.Indices;
|
---|
161 | IDependencyCalculator calc = bwInfo.Calculator;
|
---|
162 | string variable = bwInfo.Variable;
|
---|
163 | int frames = bwInfo.Frames;
|
---|
164 | double[,] alreadyCalculated = bwInfo.AlreadyCalculated;
|
---|
165 |
|
---|
166 | IList<string> doubleVariableNames = dataset.DoubleVariables.ToList();
|
---|
167 | OnlineCalculatorError error = OnlineCalculatorError.None;
|
---|
168 | int length = doubleVariableNames.Count;
|
---|
169 | double[,] elements = new double[length, frames + 1];
|
---|
170 | double calculations = (frames + 1) * length;
|
---|
171 |
|
---|
172 | worker.ReportProgress(0);
|
---|
173 |
|
---|
174 | int start = 0;
|
---|
175 | if (alreadyCalculated != null) {
|
---|
176 | for (int i = 0; i < alreadyCalculated.GetLength(0); i++) {
|
---|
177 | Array.Copy(alreadyCalculated, i * alreadyCalculated.GetLength(1), elements, i * elements.GetLength(1), alreadyCalculated.GetLength(1));
|
---|
178 | }
|
---|
179 | start = alreadyCalculated.GetLength(1);
|
---|
180 | }
|
---|
181 |
|
---|
182 | for (int i = 0; i < length; i++) {
|
---|
183 | for (int j = start; j <= frames; j++) {
|
---|
184 | if (worker.CancellationPending) {
|
---|
185 | worker.ReportProgress(100);
|
---|
186 | e.Cancel = true;
|
---|
187 | return;
|
---|
188 | }
|
---|
189 |
|
---|
190 | IEnumerable<double> var1 = problemData.Dataset.GetDoubleValues(variable, indices);
|
---|
191 | IEnumerable<double> var2 = problemData.Dataset.GetDoubleValues(doubleVariableNames[i], indices);
|
---|
192 |
|
---|
193 | var valuesInFrame = var1.Take(j);
|
---|
194 | var help = var1.Skip(j).ToList();
|
---|
195 | help.AddRange(valuesInFrame);
|
---|
196 | var1 = help;
|
---|
197 |
|
---|
198 | elements[i, j] = calc.Calculate(var1, var2, out error);
|
---|
199 |
|
---|
200 | if (!error.Equals(OnlineCalculatorError.None)) {
|
---|
201 | elements[i, j] = double.NaN;
|
---|
202 | }
|
---|
203 | worker.ReportProgress((int)((100.0 / calculations) * (i * (frames + 1) + j + 1)));
|
---|
204 | }
|
---|
205 | }
|
---|
206 | e.Result = elements;
|
---|
207 | worker.ReportProgress(100);
|
---|
208 | }
|
---|
209 |
|
---|
210 | private void BwRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
|
---|
211 | BackgroundWorker worker = sender as BackgroundWorker;
|
---|
212 | if (!e.Cancelled && !worker.CancellationPending) {
|
---|
213 | if (e.Error != null) {
|
---|
214 | MainFormManager.MainForm.ShowError(e.Error.Message, e.Error);
|
---|
215 | } else {
|
---|
216 | OnCorrelationCalculationFinished((double[,])e.Result, bwInfo.Calculator, bwInfo.Partition, bwInfo.Variable);
|
---|
217 | }
|
---|
218 | } else if (bwInfo != null) {
|
---|
219 | bw.RunWorkerAsync(bwInfo);
|
---|
220 | }
|
---|
221 | }
|
---|
222 | #endregion
|
---|
223 |
|
---|
224 | #region events
|
---|
225 | public class CorrelationCalculationFinishedArgs : EventArgs {
|
---|
226 | public double[,] Correlation { get; private set; }
|
---|
227 | public IDependencyCalculator Calculcator { get; private set; }
|
---|
228 | public string Partition { get; private set; }
|
---|
229 | public string Variable { get; private set; }
|
---|
230 |
|
---|
231 | public CorrelationCalculationFinishedArgs(double[,] correlation, IDependencyCalculator calculator, string partition, string variable = null) {
|
---|
232 | this.Correlation = correlation;
|
---|
233 | this.Calculcator = calculator;
|
---|
234 | this.Partition = partition;
|
---|
235 | this.Variable = variable;
|
---|
236 | }
|
---|
237 | }
|
---|
238 |
|
---|
239 | public delegate void CorrelationCalculationFinishedHandler(object sender, CorrelationCalculationFinishedArgs e);
|
---|
240 | public event CorrelationCalculationFinishedHandler CorrelationCalculationFinished;
|
---|
241 | protected virtual void OnCorrelationCalculationFinished(double[,] correlation, IDependencyCalculator calculator, string partition, string variable = null) {
|
---|
242 | var handler = CorrelationCalculationFinished;
|
---|
243 | if (handler != null)
|
---|
244 | handler(this, new CorrelationCalculationFinishedArgs(correlation, calculator, partition, variable));
|
---|
245 | }
|
---|
246 |
|
---|
247 | public delegate void ProgressCalculationHandler(object sender, ProgressChangedEventArgs e);
|
---|
248 | public event ProgressCalculationHandler ProgressCalculation;
|
---|
249 | protected void BwProgressChanged(object sender, ProgressChangedEventArgs e) {
|
---|
250 | BackgroundWorker worker = sender as BackgroundWorker;
|
---|
251 | if (ProgressCalculation != null) {
|
---|
252 | ProgressCalculation(sender, e);
|
---|
253 | }
|
---|
254 | }
|
---|
255 | #endregion
|
---|
256 |
|
---|
257 | private class BackgroundWorkerInfo {
|
---|
258 | public IDataset Dataset { get; set; }
|
---|
259 | public IDependencyCalculator Calculator { get; set; }
|
---|
260 | public string Partition { get; set; }
|
---|
261 | public IEnumerable<int> Indices { get; set; }
|
---|
262 | public string Variable { get; set; }
|
---|
263 | public int Frames { get; set; }
|
---|
264 | public double[,] AlreadyCalculated { get; set; }
|
---|
265 | }
|
---|
266 | }
|
---|
267 | }
|
---|