source: trunk/yat/classifier/KNN_Uniform.h @ 1580

Last change on this file since 1580 was 1522, checked in by Peter, 13 years ago

passing by reference rather than by value

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.7 KB
Line 
1#ifndef theplu_yat_classifier_knn_uniform_h
2#define theplu_yat_classifier_knn_uniform_h
3
4// $Id: KNN_Uniform.h 1522 2008-09-23 13:41:19Z peter $
5
6/*
7  Copyright (C) 2008 Markus Ringnér
8
9  This file is part of the yat library, http://dev.thep.lu.se/yat
10
11  The yat library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU General Public License as
13  published by the Free Software Foundation; either version 3 of the
14  License, or (at your option) any later version.
15
16  The yat library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  General Public License for more details.
20
21  You should have received a copy of the GNU General Public License
22  along with yat. If not, see <http://www.gnu.org/licenses/>.
23*/
24
25
26#include <vector>
27
28namespace theplu {
29namespace yat {
30 
31  namespace utility {
32    class VectorBase;
33    class VectorMutable;
34  }
35
36namespace classifier {
37
38  class Target;
39
40 
41  ///
42  /// @brief A model of the concept \ref concept_neighbor_weighting to
43  /// be used with KNN to weight the votes of the k nearest neighbors
44  /// of a sample.
45  ///
46  /// KNN_Uniform weights the nearest neighbours uniformly
47  /// so the total vote for a class is equal to the number of nearest
48  /// neighbors belonging to the class.
49  ///
50  struct KNN_Uniform
51  {   
52    /**
53       The total vote for each class is calculated and returned in prediction.
54    */
55    void operator()(const utility::VectorBase& distance,
56                    const std::vector<size_t>& k_sorted, 
57                    const Target& target, 
58                    utility::VectorMutable& prediction) const;   
59  };
60
61}}} // of namespace classifier, yat, and theplu
62   
63#endif
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