1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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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.Linq;
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25 | using System.Text;
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26 | using HeuristicLab.Analysis.SolutionCaching.RealVectorEncoding;
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27 | using HeuristicLab.Common;
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28 | using HeuristicLab.Core;
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29 | using HeuristicLab.Data;
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30 | using HeuristicLab.Encodings.RealVectorEncoding;
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31 | using HeuristicLab.Optimization;
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32 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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33 |
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34 | namespace HeuristicLab.Analysis.AlgorithmBehavior.Analyzers {
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35 | [Item("RealVectorConvexHullModifier", "Calculates the convex hull from a solution cache. ")]
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36 | [StorableClass]
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37 | public class RealVectorConvexHullModifier : ParameterizedNamedItem, IRunCollectionModifier {
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38 | private const string SolutionCacheResultName = "SolutionCache";
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39 |
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40 | [StorableConstructor]
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41 | protected RealVectorConvexHullModifier(bool deserializing) : base(deserializing) { }
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42 | protected RealVectorConvexHullModifier(RealVectorConvexHullModifier original, Cloner cloner) : base(original, cloner) { }
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43 | public RealVectorConvexHullModifier() { }
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44 | public override IDeepCloneable Clone(Cloner cloner) {
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45 | return new RealVectorConvexHullModifier(this, cloner);
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46 | }
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47 |
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48 | public void Modify(List<IRun> runs) {
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49 | foreach (var run in runs) {
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50 | int i = 0;
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51 | if (!run.Results.ContainsKey(SolutionCacheResultName)) continue;
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52 | var solutionCache = run.Results.Single(x => x.Key == "SolutionCache").Value as RealVectorSolutionCache;
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53 | if (solutionCache == null) continue;
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54 |
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55 | var sols = solutionCache.GetSolutionsFromGeneration(i);
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56 | DataTable volDataTable = new DataTable("Convex hull volume over generations");
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57 | DataTable nrOfPointsTable = new DataTable("Nr. of points of convex hull");
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58 | DoubleValue overallVolumn = new DoubleValue();
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59 |
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60 | DataRow dtVolumeRow = new DataRow("Volume");
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61 | DataRow dtNrPointsRow = new DataRow("Nr. of points");
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62 | volDataTable.Rows.Add(dtVolumeRow);
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63 | nrOfPointsTable.Rows.Add(dtNrPointsRow);
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64 |
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65 | List<double[]> curHull = null;
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66 |
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67 | while (sols.Count != 0) {
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68 | var input = sols.Select(x => ConvertRealVectorToVertexArray(x)).ToArray();
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69 | var convexHull = LPHull.Calculate(input);
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70 | var volume = ConvexHullMeasures.CalculateVolume(convexHull);
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71 | dtVolumeRow.Values.Add(volume);
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72 | dtNrPointsRow.Values.Add(convexHull.Count);
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73 |
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74 | if (curHull == null) {
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75 | curHull = convexHull;
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76 | } else {
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77 | var newPHull = curHull.Union(convexHull).ToArray();
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78 | curHull = LPHull.Calculate(newPHull);
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79 | }
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80 |
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81 | sols = solutionCache.GetSolutionsFromGeneration(++i);
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82 | }
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83 | overallVolumn.Value = ConvexHullMeasures.CalculateVolume(curHull);
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84 |
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85 | run.Results.Add("Overall volumn: ", overallVolumn);
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86 | run.Results.Add("Convex hull volumn", volDataTable);
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87 | run.Results.Add("Convex nr. of points", nrOfPointsTable);
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88 | }
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89 | }
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90 |
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91 | private double[] ConvertRealVectorToVertexArray(RealVector p) {
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92 | double[] vertex = p.Select(x => (double)x).ToArray();
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93 | return vertex;
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94 | }
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95 | }
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96 | } |
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