source: trunk/yat/normalizer/QuantileNormalizer.cc @ 1497

Last change on this file since 1497 was 1497, checked in by Peter, 13 years ago

changing name to normalizer - closes #416

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.9 KB
Line 
1// $Id: QuantileNormalizer.cc 1497 2008-09-12 18:30:41Z peter $
2
3/*
4  Copyright (C) 2005, 2006 Jari Häkkinen, Markus Ringnér
5  Copyright (C) 2007 Jari Häkkinen, Peter Johansson
6  Copyright (C) 2008 Peter Johansson
7
8  This file is part of the yat library, http://dev.thep.lu.se/yat
9
10  The yat library is free software; you can redistribute it and/or
11  modify it under the terms of the GNU General Public License as
12  published by the Free Software Foundation; either version 3 of the
13  License, or (at your option) any later version.
14
15  The yat library is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  General Public License for more details.
19
20  You should have received a copy of the GNU General Public License
21  along with yat. If not, see <http://www.gnu.org/licenses/>.
22*/
23
24#include "QuantileNormalizer.h"
25
26#include "yat/statistics/Averager.h"
27
28#include "yat/utility/Matrix.h"
29#include "yat/utility/VectorConstView.h"
30
31#include <cassert>
32
33namespace theplu {
34namespace yat {
35namespace normalizer {
36
37  void QuantileNormalizer::operator()(const utility::Matrix& data,
38                                      utility::Matrix& result) const
39  {
40    assert(data.rows()==result.rows());
41    utility::Matrix data_copy(data);
42   
43    // sort columns in copy
44    for (size_t column=0; column<data_copy.columns(); ++column){
45      std::sort(data_copy.begin_column(column), data_copy.end_column(column));
46    }
47
48    // calculate average of each row
49    std::vector<yat::statistics::Averager> averager(data_copy.rows());
50    for (size_t row=0; row<data_copy.rows(); ++row){
51      add(averager[row], data_copy.begin_row(row), data_copy.end_row(row));
52    }
53
54    for (size_t column=0; column<result.columns(); ++column){
55      std::vector<size_t> index;
56      utility::sort_index(index, result.column_const_view(column));
57                               
58      for (size_t row=0; row<result.rows(); ++row)
59        result(index[row], column) = averager[row].mean();
60    }
61  }
62
63
64
65}}} // end of namespace utility, yat and thep
Note: See TracBrowser for help on using the repository browser.