source: trunk/c++_tools/classifier/CrossValidationSampler.h @ 645

Last change on this file since 645 was 645, checked in by Markus Ringnér, 15 years ago

Minor things

File size: 2.0 KB
Line 
1#ifndef _theplu_classifier_crossvalidation_sampler_
2#define _theplu_classifier_crossvalidation_sampler_
3
4// $Id$
5
6/*
7  Copyright (C) 2006 Peter Johansson
8
9  This file is part of the thep c++ tools library,
10                                http://lev.thep.lu.se/trac/c++_tools
11
12  The c++ tools library is free software; you can redistribute it
13  and/or modify it under the terms of the GNU General Public License
14  as published by the Free Software Foundation; either version 2 of
15  the License, or (at your option) any later version.
16
17  The c++ tools library is distributed in the hope that it will be
18  useful, but WITHOUT ANY WARRANTY; without even the implied warranty
19  of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
20  General Public License for more details.
21
22  You should have received a copy of the GNU General Public License
23  along with this program; if not, write to the Free Software
24  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25  02111-1307, USA.
26*/
27
28#include <c++_tools/classifier/Sampler.h>
29
30namespace theplu {
31namespace classifier { 
32
33  class Target;
34
35  ///
36  /// Class splitting a set into training set and validation set in a
37  /// crossvalidation manner. This is done in a balanced way, meaning
38  /// the proportions between the classes in the trainingset is close
39  /// to the proportions in the whole dataset. In the first \a k
40  /// rounds each sample is returned k-1 times, for next round the
41  /// samples are shuffled and... In total there are N partitions, in
42  /// other words, each sample is in validation roughly N/k
43  ///   
44  class CrossValidationSampler : public Sampler
45  {
46 
47  public:
48    ///
49    /// @brief Constructor
50    /// 
51    /// @a target targets.   
52    /// @a N total number of partitions.
53    /// @a k for k-fold crossvalidation.
54    ///
55    CrossValidationSampler(const Target& target, const size_t N,const size_t k);
56
57    ///
58    /// Destructor
59    ///
60    virtual ~CrossValidationSampler();
61
62  private:
63    void build(const Target& target, size_t N, size_t k); 
64    const size_t k_;
65
66  };
67
68}} // of namespace classifier and namespace theplu
69
70#endif
71
Note: See TracBrowser for help on using the repository browser.