source: branches/2994-AutoDiffForIntervals/HeuristicLab.Analysis/3.3/MultiObjective/RankBasedParetoFrontAnalyzer.cs @ 17209

Last change on this file since 17209 was 17209, checked in by gkronber, 3 months ago

#2994: merged r17132:17198 from trunk to branch

File size: 3.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 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
22using System.Collections.Generic;
23using System.Linq;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HEAL.Attic;
30
31namespace HeuristicLab.Analysis {
32  [Item("RankBasedParetoFrontAnalyzer", "Uses the rank value that is computed by e.g. the NSGA2's fast non dominated sort operator to collect all solutions and their qualities of front 0 (the current Pareto front).")]
33  [StorableType("9F314FB6-6BA2-4CC8-843B-B68CF01F7BE7")]
34  public class RankBasedParetoFrontAnalyzer : ParetoFrontAnalyzer {
35    public IScopeTreeLookupParameter<IntValue> RankParameter {
36      get { return (IScopeTreeLookupParameter<IntValue>)Parameters["Rank"]; }
37    }
38
39    [StorableConstructor]
40    protected RankBasedParetoFrontAnalyzer(StorableConstructorFlag _) : base(_) { }
41    protected RankBasedParetoFrontAnalyzer(RankBasedParetoFrontAnalyzer original, Cloner cloner) : base(original, cloner) { }
42    public RankBasedParetoFrontAnalyzer() {
43      Parameters.Add(new ScopeTreeLookupParameter<IntValue>("Rank", "The rank of solution [0..N] describes to which front it belongs."));
44    }
45
46    protected override void Analyze(ItemArray<DoubleArray> qualities, ResultCollection results) {
47      ItemArray<IntValue> ranks = RankParameter.ActualValue;
48
49      bool populationLevel = RankParameter.Depth == 1;
50
51      int objectives = qualities[0].Length;
52      int frontSize = ranks.Count(x => x.Value == 0);
53      ItemArray<IScope> paretoArchive = null;
54      if (populationLevel) paretoArchive = new ItemArray<IScope>(frontSize);
55
56      DoubleMatrix front = new DoubleMatrix(frontSize, objectives);
57      int counter = 0;
58      for (int i = 0; i < ranks.Length; i++) {
59        if (ranks[i].Value == 0) {
60          for (int k = 0; k < objectives; k++)
61            front[counter, k] = qualities[i][k];
62          if (populationLevel) {
63            paretoArchive[counter] = (IScope)ExecutionContext.Scope.SubScopes[i].Clone();
64          }
65          counter++;
66        }
67      }
68
69      front.RowNames = GetRowNames(front);
70      front.ColumnNames = GetColumnNames(front);
71
72      if (results.ContainsKey("Pareto Front"))
73        results["Pareto Front"].Value = front;
74      else results.Add(new Result("Pareto Front", front));
75
76      if (populationLevel) {
77        if (results.ContainsKey("Pareto Archive"))
78          results["Pareto Archive"].Value = paretoArchive;
79        else results.Add(new Result("Pareto Archive", paretoArchive));
80      }
81    }
82
83    private IEnumerable<string> GetRowNames(DoubleMatrix front) {
84      for (int i = 1; i <= front.Rows; i++)
85        yield return "Solution " + i.ToString();
86    }
87
88    private IEnumerable<string> GetColumnNames(DoubleMatrix front) {
89      for (int i = 1; i <= front.Columns; i++)
90        yield return "Objective " + i.ToString();
91    }
92
93    public override IDeepCloneable Clone(Cloner cloner) {
94      return new RankBasedParetoFrontAnalyzer(this, cloner);
95    }
96  }
97}
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