source: trunk/c++_tools/statistics/Histogram.cc @ 675

Last change on this file since 675 was 675, checked in by Jari Häkkinen, 15 years ago

References #83. Changing project name to yat. Compilation will fail in this revision.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.8 KB
Line 
1// $Id: Histogram.cc 675 2006-10-10 12:08:45Z jari $
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 "yat/statistics/Histogram.h"
25
26#include <cmath>
27#include <fstream>
28
29
30namespace theplu {
31namespace statistics {
32
33
34Histogram::Histogram(void)
35  : xmax_(0), xmin_(0), sum_all_(), sum_histogram_()
36{
37}
38
39
40
41Histogram::Histogram(const Histogram& b)
42{
43  *this=b;
44}
45
46
47
48Histogram::Histogram(const double min, const double max, const size_t n)
49  : histogram_(std::vector<double>(n,0.0)),
50    xmax_(max), xmin_(min),
51    sum_all_(), sum_histogram_()
52{
53}
54
55
56
57Histogram::~Histogram(void)
58{
59}
60
61
62
63int Histogram::add(const double x, const double w)
64{
65  sum_all_.add(x,w);
66  if (x<xmin_)
67    return -1;
68  else if (x>=xmax_)
69    return 1;
70 
71  sum_histogram_.add(x,w);
72  histogram_[bin(x)] += w;
73  return 0;
74}
75
76
77
78void Histogram::normalize(bool choice)
79{
80  double scale_factor;
81  if (choice) 
82    scale_factor = sum_all_.sum_w();
83  else
84    scale_factor = sum_all_.sum_w()*spacing();
85  for (size_t i=0; i<histogram_.size(); i++)
86    histogram_[i]/=scale_factor;
87
88}
89
90
91void Histogram::reset(void)
92{
93  for (u_int i=0; i<histogram_.size(); i++)
94    histogram_[i]=0;
95  sum_all_.reset();
96  sum_histogram_.reset();
97}
98
99
100
101const Histogram& Histogram::operator=(const Histogram& b)
102{
103  if (this==&b)
104    return *this;
105  histogram_=b.histogram_;
106  xmax_=b.xmax_;
107  xmin_=b.xmin_;
108  sum_all_=b.sum_all_;
109  sum_histogram_=b.sum_histogram_;
110  return *this;
111}
112
113
114
115std::ostream& operator<<(std::ostream& s,const Histogram& histogram)
116{
117  s << "# histogram min : " << histogram.xmin() << '\n';
118  s << "# histogram max : " << histogram.xmax() << '\n';
119  s << "# number of bins: " << histogram.nof_bins() << '\n';
120  s << "# nof points in histogram : " 
121    << histogram.averager_histogram().sum_w() << '\n';
122  s << "# nof points in total:      " 
123    << histogram.averager_all().sum_w() << '\n';
124  s << "# column 1: center of observation bin\n"
125    << "# column 2: frequency\n";
126
127  for (u_int i=0; i<histogram.nof_bins(); i++) {
128    s.width(12);
129    s << histogram.observation_value(i);
130    s.width(12);
131    s << histogram[i] << '\n';
132  }
133
134  return s;
135}
136
137}} // of namespace statistics and namespace theplu
Note: See TracBrowser for help on using the repository browser.