source: branches/0.4-stable/yat/statistics/AveragerPairWeighted.cc @ 1743

Last change on this file since 1743 was 1743, checked in by Peter, 12 years ago

updating copyright statements

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.5 KB
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1// $Id: AveragerPairWeighted.cc 1743 2009-01-23 14:20:30Z peter $
2
3/*
4  Copyright (C) 2005 Peter Johansson, Markus Ringnér
5  Copyright (C) 2006 Jari Häkkinen, Peter Johansson
6  Copyright (C) 2007 Jari Häkkinen, Peter Johansson, Markus Ringnér
7  Copyright (C) 2008 Peter Johansson
8
9  This file is part of the yat library, http://dev.thep.lu.se/yat
10
11  The yat library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU General Public License as
13  published by the Free Software Foundation; either version 2 of the
14  License, or (at your option) any later version.
15
16  The yat library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  General Public License for more details.
20
21  You should have received a copy of the GNU General Public License
22  along with this program; if not, write to the Free Software
23  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24  02111-1307, USA.
25*/
26
27#include "AveragerPairWeighted.h"
28#include "AveragerPair.h"
29#include "Averager.h"
30
31#include <cassert>
32
33namespace theplu {
34namespace yat {
35namespace statistics {
36
37
38  AveragerPairWeighted::AveragerPairWeighted(void)
39    : wxy_(0), w_(0)
40  {
41  }
42
43
44  void  AveragerPairWeighted::add(const double x, const double y, 
45                                  const double wx, const double wy)
46  { 
47    if(wx==0.0 || wy==0.0) {
48      return;
49    }
50    assert(!std::isnan(x) && "x is nan");
51    assert(!std::isnan(y) && "y is nan");
52    assert(!std::isnan(wx) && "wx is nan");
53    assert(!std::isnan(wy) && "wy is nan");
54    double w=wx*wy;
55    x_.add(x,w);
56    y_.add(y,w); 
57    wxy_ += w*x*y;   
58    w_ +=w;
59  }
60
61
62  double AveragerPairWeighted::correlation(void) const
63  {
64    return covariance() / sqrt(x_.variance()*y_.variance());
65  }
66
67
68  double AveragerPairWeighted::covariance(void) const
69  {
70    return sum_xy_centered()/sum_w();
71  }
72
73
74  double AveragerPairWeighted::msd(void) const
75  {
76    return (x_.sum_wxx()+y_.sum_wxx()-2*wxy_)/w_;
77  }
78
79
80  double AveragerPairWeighted::n(void) const
81  {
82    return x_.n();
83  }
84
85
86  void AveragerPairWeighted::reset(void)
87  {
88    x_.reset(); y_.reset(); wxy_=0; w_=0;
89  }
90
91
92  double AveragerPairWeighted::sum_w(void) const
93  {
94    return w_;
95  }
96
97
98  double AveragerPairWeighted::sum_xy(void) const
99  {
100    return wxy_;
101  }
102
103
104  double AveragerPairWeighted::sum_xy_centered(void) const
105  {
106    return sum_xy() - x_.sum_wx()*y_.mean();
107  }
108
109
110  const AveragerWeighted& AveragerPairWeighted::x_averager(void) const
111  {
112    return x_;
113  }
114
115
116  const AveragerWeighted& AveragerPairWeighted::y_averager(void) const
117  {
118    return y_;
119  }
120
121}}} // of namespace statistics, yat, and theplu
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