source: branches/2839_HiveProjectManagement/HeuristicLab.Encodings.LinearLinkageEncoding/3.4/SimilarityCalculators/HammingSimilarityCalculator.cs @ 16057

Last change on this file since 16057 was 16057, checked in by jkarder, 15 months ago

#2839:

File size: 2.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 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;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Optimization.Operators;
26using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
27
28namespace HeuristicLab.Encodings.LinearLinkageEncoding {
29  [Item("Hamming Similarity Calculator for LinearLinkage", "Calculates the hamming similarity for two linear linkage encoded solutions.")]
30  [StorableClass]
31  public sealed class HammingSimilarityCalculator : SingleObjectiveSolutionSimilarityCalculator {
32    protected override bool IsCommutative { get { return true; } }
33
34    [StorableConstructor]
35    private HammingSimilarityCalculator(bool deserializing) : base(deserializing) { }
36    private HammingSimilarityCalculator(HammingSimilarityCalculator original, Cloner cloner) : base(original, cloner) { }
37    public HammingSimilarityCalculator() : base() { }
38
39    public override IDeepCloneable Clone(Cloner cloner) {
40      return new HammingSimilarityCalculator(this, cloner);
41    }
42
43    public static double CalculateSimilarity(LinearLinkage left, LinearLinkage right) {
44      if (left == null || right == null)
45        throw new ArgumentException("Cannot calculate similarity because one or both of the provided solutions is null.");
46      if (left.Length != right.Length)
47        throw new ArgumentException("Cannot calculate similarity because the provided solutions have different lengths.");
48      if (left.Length == 0)
49        throw new ArgumentException("Cannot calculate similarity because solutions are of length 0.");
50      if (ReferenceEquals(left, right)) return 1.0;
51
52      var similarity = 0;
53      for (var i = 0; i < left.Length; i++) {
54        if (left[i] == right[i]) similarity++;
55      }
56      return similarity / (double)left.Length;
57    }
58
59    public override double CalculateSolutionSimilarity(IScope leftSolution, IScope rightSolution) {
60      var left = leftSolution.Variables[SolutionVariableName].Value as LinearLinkage;
61      var right = rightSolution.Variables[SolutionVariableName].Value as LinearLinkage;
62
63      return CalculateSimilarity(left, right);
64    }
65  }
66}
Note: See TracBrowser for help on using the repository browser.