source: trunk/c++_tools/classifier/CrossValidationSampler.h @ 612

Last change on this file since 612 was 612, checked in by Peter, 15 years ago
File size: 2.1 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#include <c++_tools/classifier/Target.h>
30
31namespace theplu {
32namespace classifier { 
33
34  ///
35  /// Class splitting a set into training set and validation set in a
36  /// crossvalidation manner. This is done in a balanced way, meaning
37  /// the proportions between the classes in the trainingset is close
38  /// to the proportions in the whole dataset. In the first \a k
39  /// rounds each sample is returned k-1 times, for next round the
40  /// samples are shuffled and... In total there are N partitions, in
41  /// other words, each sample is in validation roughly N/k
42  ///   
43  class CrossValidationSampler : public Sampler
44  {
45 
46  public:
47    ///
48    /// @brief Constructor
49    /// 
50    /// @parameter Target targets
51    /// @parameter N total number of partitions
52    /// @parameter k for k-fold crossvalidation
53    ///
54    CrossValidationSampler(const Target& target, const size_t N,const size_t k);
55
56    ///
57    /// Destructor
58    ///
59    virtual ~CrossValidationSampler();
60
61  private:
62    void build(const Target& target, size_t N, size_t k); 
63    const size_t k_;
64
65  };
66
67}} // of namespace classifier and namespace theplu
68
69#endif
70
Note: See TracBrowser for help on using the repository browser.