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source: branches/3.0/sources/HeuristicLab.Functions/Addition.cs @ 17116

Last change on this file since 17116 was 2, checked in by swagner, 17 years ago

Added HeuristicLab 3.0 sources from former SVN repository at revision 52

File size: 2.3 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.Text;
25using HeuristicLab.Core;
26using System.Diagnostics;
27using HeuristicLab.Constraints;
28using System.Linq;
29using HeuristicLab.DataAnalysis;
30
31namespace HeuristicLab.Functions {
32  public class Addition : FunctionBase {
33    public override string Description {
34      get {
35        return @"Returns the sum of all sub-operator results.
36    (+ 3) => 3
37    (+ 2 3) => 5
38    (+ 3 4 5) => 12";
39      }
40    }
41
42    public Addition()
43      : base() {
44      // 2 - 3 seems like an reasonable defaut (used for +,-,*,/) (discussion with swinkler and maffenze)
45      AddConstraint(new NumberOfSubOperatorsConstraint(2, 3));
46    }
47
48    public Addition(Addition source, IDictionary<Guid, object> clonedObjects)
49      : base(source, clonedObjects) {
50    }
51
52
53    public override double Evaluate(Dataset dataset, int sampleIndex) {
54      // (+ 3) => 3
55      // (+ 2 3) => 5
56      // (+ 3 4 5) => 12
57      double sum = 0.0;
58      for (int i = SubFunctions.Count - 1; i >= 0; i--) {
59        sum += SubFunctions[i].Evaluate(dataset, sampleIndex);
60      }
61      return sum;
62    }
63
64    public override object Clone(IDictionary<Guid, object> clonedObjects) {
65      Addition clone = new Addition(this, clonedObjects);
66      clonedObjects.Add(clone.Guid, clone);
67      return clone;
68    }
69
70    public override void Accept(IFunctionVisitor visitor) {
71      visitor.Visit(this);
72    }
73  }
74}
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