source: branches/0.4-stable/yat/classifier/KNN_ReciprocalDistance.h @ 1392

Last change on this file since 1392 was 1392, checked in by Peter, 13 years ago

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1#ifndef theplu_yat_classifier_knn_reciprocal_distance_h
2#define theplu_yat_classifier_knn_reciprocal_distance_h
3
4// $Id: KNN_ReciprocalDistance.h 1392 2008-07-28 19:35:30Z 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 2 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  /// @brief A model of the concept \ref concept_neighbor_weighting to
44  /// be used with KNN to weight the votes of the k nearest neighbors
45  /// of a sample.
46  ///
47  /// KNN_ReciprocalDistance weights the vote of a nearest neighbor with
48  /// its reciprocal rank.
49  struct KNN_ReciprocalDistance
50  {   
51    /**
52       The total vote for each class is calculated and returned in prediction.
53    */
54    void operator()(const utility::VectorBase& dist,
55                    const std::vector<size_t> k_sorted,
56                    const Target& target, 
57                    utility::VectorMutable& prediction) const;   
58  };
59
60}}} // of namespace classifier, yat, and theplu
61   
62#endif
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