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source: branches/3.0/sources/HeuristicLab.Functions/Xor.cs @ 4384

Last change on this file since 4384 was 2, checked in by swagner, 16 years ago

Added HeuristicLab 3.0 sources from former SVN repository at revision 52

File size: 2.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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 System.Collections.Generic;
24using System.Linq;
25using System.Text;
26using HeuristicLab.Constraints;
27using HeuristicLab.DataAnalysis;
28
29namespace HeuristicLab.Functions {
30  public class Xor : FunctionBase {
31    public override string Description {
32      get {
33        return @"Logical XOR operation. Only defined for sub-operator-results 0.0 and 1.0.";
34      }
35    }
36
37    public Xor()
38      : base() {
39      AddConstraint(new NumberOfSubOperatorsConstraint(2, 2));
40    }
41
42    public Xor(Xor source, IDictionary<Guid, object> clonedObjects)
43      : base(source, clonedObjects) {
44    }
45
46
47    public override double Evaluate(Dataset dataset, int sampleIndex) {
48      double r0 = Math.Round(SubFunctions[0].Evaluate(dataset, sampleIndex));
49      double r1 = Math.Round(SubFunctions[1].Evaluate(dataset, sampleIndex));
50      if((r0 == 0.0 && r1 == 0.0) ||
51        (r0 == 1.0 && r1 == 1.0)) return 0.0;
52      else if((r0 == 0.0 && r1 == 1.0) ||
53        (r0 == 1.0 && r1 == 0.0)) return 1.0;
54      else return double.NaN;
55    }
56
57    public override object Clone(IDictionary<Guid, object> clonedObjects) {
58      Xor clone = new Xor(this, clonedObjects);
59      clonedObjects.Add(clone.Guid, clone);
60      return clone;
61    }
62
63    public override void Accept(IFunctionVisitor visitor) {
64      visitor.Visit(this);
65    }
66  }
67}
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