source: trunk/yat/statistics/SAMScore.cc @ 779

Last change on this file since 779 was 779, checked in by Peter, 15 years ago

Refs #101

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1// $Id: SAMScore.cc 779 2007-03-05 18:58:30Z peter $
2
3/*
4  Copyright (C) The authors contributing to this file.
5
6  This file is part of the yat library, http://lev.thep.lu.se/trac/yat
7
8  The yat library is free software; you can redistribute it and/or
9  modify it under the terms of the GNU General Public License as
10  published by the Free Software Foundation; either version 2 of the
11  License, or (at your option) any later version.
12
13  The yat library is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  General Public License for more details.
17
18  You should have received a copy of the GNU General Public License
19  along with this program; if not, write to the Free Software
20  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21  02111-1307, USA.
22*/
23
24#include "SAMScore.h"
25#include "Averager.h"
26#include "AveragerWeighted.h"
27#include "yat/classifier/DataLookupWeighted1D.h"
28#include "yat/classifier/Target.h"
29#include "yat/utility/vector.h"
30
31#include <cmath>
32
33namespace theplu {
34namespace yat {
35namespace statistics { 
36
37  SAMScore::SAMScore(const double s0, bool b) 
38    : Score(b), s0_(s0)
39  {
40  }
41
42  double SAMScore::score(const classifier::Target& target, 
43                         const utility::vector& value) const
44  {
45    statistics::Averager positive;
46    statistics::Averager negative;
47    for(size_t i=0; i<target.size(); i++){
48      if (target.binary(i))
49        positive.add(value(i));
50      else
51        negative.add(value(i));
52    }
53    return score(positive, negative);
54  }
55
56  double SAMScore::score(const classifier::Target& target, 
57                         const classifier::DataLookupWeighted1D& value) const
58  {
59    statistics::AveragerWeighted positive;
60    statistics::AveragerWeighted negative;
61    for(size_t i=0; i<target.size(); i++){
62      if (target.binary(i))
63        positive.add(value.data(i),value.weight(i));
64      else
65        negative.add(value.data(i),value.weight(i));
66    }
67    return score(positive, negative);
68  }
69
70
71
72  double SAMScore::score(const classifier::Target& target, 
73                         const utility::vector& value,
74                         const utility::vector& weight) const
75  {
76    statistics::AveragerWeighted positive;
77    statistics::AveragerWeighted negative;
78    for(size_t i=0; i<target.size(); i++){
79      if (target.binary(i))
80        positive.add(value(i),weight(i));
81      else
82        negative.add(value(i),weight(i));
83    }
84    return score(positive, negative);
85  }
86
87}}} // of namespace statistics, yat, and theplu
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