[17225] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2018 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.Linq;
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| 23 | using HEAL.Attic;
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| 24 | using HeuristicLab.Common;
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| 25 | using HeuristicLab.Core;
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| 26 | using HeuristicLab.Data;
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| 27 | using HeuristicLab.Optimization;
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| 28 | using HeuristicLab.Parameters;
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| 29 |
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| 30 | namespace HeuristicLab.Analysis {
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| 31 | [StorableType("fc42ed56-15de-41df-bf59-0e5b11cd4f9b")]
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| 32 | [Item("HypervolumeAnalyzer", "Computes the enclosed Hypervolume between the current front and a given reference Point")]
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| 33 | public class HypervolumeAnalyzer : MultiObjectiveSuccessAnalyzer {
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| 34 | public override string ResultName {
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| 35 | get { return "Hypervolume"; }
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| 36 | }
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| 37 |
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| 38 | public ILookupParameter<DoubleArray> ReferencePointParameter {
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| 39 | get { return (ILookupParameter<DoubleArray>)Parameters["ReferencePoint"]; }
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| 40 | }
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| 41 |
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| 42 | public IResultParameter<DoubleValue> BestKnownHypervolumeResultParameter {
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| 43 | get { return (IResultParameter<DoubleValue>)Parameters["Best known hypervolume"]; }
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| 44 | }
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| 45 |
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| 46 | public IResultParameter<DoubleValue> HypervolumeDistanceResultParameter {
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| 47 | get { return (IResultParameter<DoubleValue>)Parameters["Absolute Distance to BestKnownHypervolume"]; }
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| 48 | }
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| 49 |
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| 50 |
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| 51 | [StorableConstructor]
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| 52 | protected HypervolumeAnalyzer(StorableConstructorFlag _) : base(_) { }
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| 53 |
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| 54 | protected HypervolumeAnalyzer(HypervolumeAnalyzer original, Cloner cloner) : base(original, cloner) { }
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| 55 |
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| 56 | public override IDeepCloneable Clone(Cloner cloner) {
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| 57 | return new HypervolumeAnalyzer(this, cloner);
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| 58 | }
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| 59 |
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| 60 | public HypervolumeAnalyzer() {
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| 61 | Parameters.Add(new LookupParameter<DoubleArray>("ReferencePoint", "The reference point for hypervolume calculation"));
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| 62 | Parameters.Add(new ResultParameter<DoubleValue>("Hypervolume", "The hypervolume of the current generation", "Results", new DoubleValue(double.NaN)));
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| 63 | Parameters.Add(new ResultParameter<DoubleValue>("Best known hypervolume", "The optimal hypervolume"));
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| 64 | Parameters.Add(new ResultParameter<DoubleValue>("Absolute Distance to BestKnownHypervolume", "The difference between the best known and the current hypervolume"));
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| 65 | BestKnownHypervolumeResultParameter.DefaultValue = new DoubleValue(double.NaN);
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| 66 | HypervolumeDistanceResultParameter.DefaultValue = new DoubleValue(double.NaN);
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| 67 | }
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| 68 |
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| 69 | public override IOperation Apply() {
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| 70 | var qualities = QualitiesParameter.ActualValue.Select(x => x.CloneAsArray()).ToArray();
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| 71 | var referencePoint = ReferencePointParameter.ActualValue.ToArray();
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| 72 | var best = BestKnownHypervolumeResultParameter.ActualValue.Value;
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| 73 | var maximization = MaximizationParameter.ActualValue.ToArray();
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| 74 |
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| 75 | var hv = HypervolumeCalculator.CalculateHypervolume(qualities, referencePoint, maximization);
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| 76 | if (hv > best || double.IsNaN(best)) best = hv;
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| 77 | ResultParameter.ActualValue.Value = hv;
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| 78 | BestKnownHypervolumeResultParameter.ActualValue.Value = best;
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| 79 | HypervolumeDistanceResultParameter.ActualValue.Value = best - hv;
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| 80 |
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| 81 | return base.Apply();
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| 82 | }
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| 83 | }
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| 84 | } |
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