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source: branches/3.0/sources/HeuristicLab.Functions/Average.cs @ 15016

Last change on this file since 15016 was 2, checked in by swagner, 17 years ago

Added HeuristicLab 3.0 sources from former SVN repository at revision 52

File size: 2.0 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.DataAnalysis;
27using HeuristicLab.Constraints;
28
29namespace HeuristicLab.Functions {
30  public class Average : FunctionBase {
31    public override string Description {
32      get {
33        return @"Returns the average (arithmetic mean) of all sub-operator results.";
34      }
35    }
36
37    public Average()
38      : base() {
39      AddConstraint(new NumberOfSubOperatorsConstraint(2, 3));
40    }
41
42    public Average(Average source, IDictionary<Guid, object> clonedObjects)
43      : base(source, clonedObjects) {
44    }
45
46
47    public override double Evaluate(Dataset dataset, int sampleIndex) {
48      double sum = 0.0;
49      for(int i = 0; i < SubFunctions.Count; i++) {
50        sum += SubFunctions[i].Evaluate(dataset, sampleIndex);
51      }
52      return sum / SubFunctions.Count;
53    }
54
55    public override object Clone(IDictionary<Guid, object> clonedObjects) {
56      Average clone = new Average(this, clonedObjects);
57      clonedObjects.Add(clone.Guid, clone);
58      return clone;
59    }
60
61    public override void Accept(IFunctionVisitor visitor) {
62      visitor.Visit(this);
63    }
64  }
65}
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