source: trunk/yat/classifier/KNN_Uniform.h @ 1486

Last change on this file since 1486 was 1486, checked in by Jari Häkkinen, 13 years ago

Addresses #436.

  • 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 1486 2008-09-09 21:17:19Z jari $
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 this program; if not, write to the Free Software
23  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24  02111-1307, USA.
25*/
26
27
28#include <vector>
29
30namespace theplu {
31namespace yat {
32 
33  namespace utility {
34    class VectorBase;
35    class VectorMutable;
36  }
37
38namespace classifier {
39
40  class Target;
41
42 
43  ///
44  /// @brief A model of the concept \ref concept_neighbor_weighting to
45  /// be used with KNN to weight the votes of the k nearest neighbors
46  /// of a sample.
47  ///
48  /// KNN_Uniform weights the nearest neighbours uniformly
49  /// so the total vote for a class is equal to the number of nearest
50  /// neighbors belonging to the class.
51  ///
52  struct KNN_Uniform
53  {   
54    /**
55       The total vote for each class is calculated and returned in prediction.
56    */
57    void operator()(const utility::VectorBase& distance,
58                    const std::vector<size_t> k_sorted, 
59                    const Target& target, 
60                    utility::VectorMutable& prediction) const;   
61  };
62
63}}} // of namespace classifier, yat, and theplu
64   
65#endif
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