Changeset 8507

Timestamp:

08/20/12 16:34:14 (12 years ago)

Author:

sforsten

Message:

#1776: adapted ClassificationEnsembleSolutionAccuracyToCoveredSamples

File:

• branches/ClassificationEnsembleVoting/HeuristicLab.Problems.DataAnalysis.Views/3.4/Classification/ClassificationEnsembleSolutionAccuracyToCoveredSamples.cs (modified) (5 diffs)

branches/ClassificationEnsembleVoting/HeuristicLab.Problems.DataAnalysis.Views/3.4/Classification/ClassificationEnsembleSolutionAccuracyToCoveredSamples.cs

@@ -22 +22 @@
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using System.Windows.Forms;
@@ -34 +35 @@
   public partial class ClassificationEnsembleSolutionAccuracyToCoveredSamples : DataAnalysisSolutionEvaluationView {
     private const string ACCURACYCOVERED = "Accuracy to Covered percentage";
+    private const string AREA = "Area";
 
     private const string SamplesComboBoxAllSamples = "All Samples";
@@ -39 +41 @@
     private const string SamplesComboBoxTestSamples = "Test Samples";
 
-    // zero is also a point
     private const int maxPoints = 101;
 
@@ -137 +138 @@
         covered = covered.Reverse().ToArray();
 
-
-
-        Series serie = this.chart.Series.Add(ACCURACYCOVERED);
-        serie.LegendText = ACCURACYCOVERED;
-        serie.ChartType = SeriesChartType.StepLine;
-        //serie.MarkerStyle = MarkerStyle.Diamond;
-        //serie.MarkerSize = 5;
-        serie.Points.DataBindXY(covered, accuracy);
+        Series area = this.chart.Series.Add(AREA);
+        area.ChartType = SeriesChartType.Area;
+        area.Color = Color.LightBlue;
+        IEnumerable<IEnumerable<double>> areaPoints = CalculateAreaPoints(covered, accuracy);
+        area.Points.DataBindXY(areaPoints.ElementAt(0), areaPoints.ElementAt(1));
+
+        Series series = this.chart.Series.Add(ACCURACYCOVERED);
+        series.Color = Color.Red;
+        series.ChartType = SeriesChartType.FastPoint;
+        series.MarkerStyle = MarkerStyle.Diamond;
+        series.MarkerSize = 5;
+        series.Points.DataBindXY(covered, accuracy);
+
+        double auc = CalculateAreaUnderCurve(series);
+        area.LegendToolTip = "AUC: " + auc;
       }
+    }
+
+    private IEnumerable<IEnumerable<double>> CalculateAreaPoints(double[] covered, double[] accuracy) {
+      List<double> newCovered = new List<double>();
+      List<double> worseAccuracy = new List<double>();
+      newCovered.Add(covered[0]);
+      worseAccuracy.Add(accuracy[0]);
+      for (int i = 1; i < covered.Length; i++) {
+        if (accuracy[i] > accuracy[i - 1]) {
+          worseAccuracy.Add(accuracy[i - 1]);
+          newCovered.Add(covered[i] - Double.Epsilon);
+        } else {
+          worseAccuracy.Add(accuracy[i]);
+          newCovered.Add(covered[i - 1] + Double.Epsilon);
+        }
+        worseAccuracy.Add(accuracy[i]);
+        newCovered.Add(covered[i]);
+      }
+      return new List<IEnumerable<double>>() { newCovered, worseAccuracy };
     }
 
@@ -159 +186 @@
     }
 
+    private double CalculateAreaUnderCurve(Series series) {
+      if (series.Points.Count < 1) throw new ArgumentException("Could not calculate area under curve if less than 1 data points were given.");
+
+      double auc = 0.0;
+      for (int i = 1; i < series.Points.Count; i++) {
+        double width = series.Points[i].XValue - series.Points[i - 1].XValue;
+        double y1 = series.Points[i - 1].YValues[0];
+        double y2 = series.Points[i].YValues[0];
+
+        auc += (y1 + y2) * width / 2;
+      }
+
+      return auc;
+    }
+
     #region events
     protected override void RegisterContentEvents() {