source: trunk/yat/classifier/FeatureSelector.h

Last change on this file was 2119, checked in by Peter, 12 years ago

converted files to utf-8. fixes #577

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date ID
File size: 2.2 KB
Line 
1#ifndef _theplu_yat_classifier_featureselector_
2#define _theplu_yat_classifier_featureselector_
3
4// $Id$
5
6/*
7  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson
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#include "yat/utility/Index.h"
26
27#include <list>
28
29namespace theplu {
30namespace yat {
31namespace classifier {
32  class MatrixLookup;
33  class MatrixLookupWeighted;
34  class Target;
35
36  ///
37  /// @brief Interface class for FeatureSelection
38  ///
39  class FeatureSelector
40  {
41  public:
42    ///
43    /// @brief Default Constructor
44    ///
45    FeatureSelector(size_t N, size_t skip=0);
46
47    ///
48    /// @brief Destructor
49    ///
50    virtual ~FeatureSelector(void);
51
52    ///
53    /// @return MatrixLookup containing only selected features.
54    ///
55    const MatrixLookup get(const MatrixLookup& data);
56
57    ///
58    /// @return MatrixLookupWeighted containing only selected features.
59    ///
60    const MatrixLookupWeighted get(const MatrixLookupWeighted& data);
61
62    ///
63    /// @return indices corresponding to selected features.
64    ///
65    const utility::Index features(void) const;
66
67    ///
68    /// Uses @a matrix to select features.
69    ///
70    virtual void update(const MatrixLookup& matrix, const Target& target)=0;
71
72    ///
73    /// Uses @a matrix to select features.
74    ///
75    virtual void update(const MatrixLookupWeighted& matrix, 
76                        const Target& target)=0;
77
78  protected:
79    ///
80    /// @brief features
81    ///
82    utility::Index features_;
83
84    ///
85    /// number of features to skip in list
86    ///
87    size_t first_;
88
89    ///
90    /// number of features selected and returned
91    ///
92    size_t N_;
93
94  private:
95
96  };
97
98}}} // of namespace classifier, yat, and theplu
99
100#endif
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