source: trunk/yat/statistics/WilcoxonFoldChange.cc @ 2881

Last change on this file since 2881 was 2881, checked in by Peter, 9 years ago

Define PP variables in config.h rather than in CPPFLAGS. Include
config.h into all source files. Only ammend CXXFLAGS with '-Wall
-pedantic' when --enable-debug. In default mode we respect CXXFLAGS
value set by user, or set to default value '-O3'.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.4 KB
Line 
1// $Id: WilcoxonFoldChange.cc 2881 2012-11-18 01:28:05Z peter $
2
3/*
4  Copyright (C) 2005 Peter Johansson
5  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson
6
7  This file is part of the yat library, http://dev.thep.lu.se/yat
8
9  The yat library is free software; you can redistribute it and/or
10  modify it under the terms of the GNU General Public License as
11  published by the Free Software Foundation; either version 3 of the
12  License, or (at your option) any later version.
13
14  The yat library is distributed in the hope that it will be useful,
15  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  General Public License for more details.
18
19  You should have received a copy of the GNU General Public License
20  along with yat. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include <config.h>
24
25#include "WilcoxonFoldChange.h"
26#include "utility.h"
27#include "yat/classifier/Target.h"
28#include "yat/utility/DataWeight.h"
29
30#include <cmath>
31#include <vector>
32#include <iostream>
33
34namespace theplu {
35namespace yat {
36namespace statistics {
37
38
39  WilcoxonFoldChange::WilcoxonFoldChange(bool absolute)
40    : Score(absolute)
41  {
42  }
43
44
45  double WilcoxonFoldChange::score(const classifier::Target& target, 
46                                   const utility::VectorBase& value) const
47  {
48    std::vector<double> distance;
49    //Peter, should reserve the vector to avoid reallocations   
50    for (size_t i=0; i<target.size(); i++) {
51      if (target.binary(i)) continue;
52      for (size_t j=0; j<target.size(); j++) {
53        if (!target.binary(j))
54          distance.push_back(value(i)-value(j));
55      }
56    }
57    if (absolute_)
58      return std::abs(median(distance.begin(), distance.end()));
59    return median(distance.begin(), distance.end());
60  }
61
62
63  double WilcoxonFoldChange::score(const classifier::Target& target, 
64                                   const utility::VectorBase& value,
65                                   const utility::VectorBase& weight) const
66  {
67    std::vector<utility::DataWeight> distance;
68    //Peter, should reserve the vector to avoid reallocations   
69    for (size_t i=0; i<target.size(); i++) {
70      if (target.binary(i)) continue;
71      for (size_t j=0; j<target.size(); j++) {
72        if (!target.binary(j))
73          distance.push_back(utility::DataWeight(value(i)-value(j),
74                                                 weight(i)*weight(j)));
75      }
76    }
77    if (absolute_)
78      return std::abs(median(distance.begin(), distance.end()));
79    return median(distance.begin(), distance.end());
80   
81
82    return 0;
83  }
84
85}}} // of namespace statistics, yat, and theplu
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