1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/* gsl_histogram_oper.c
* Copyright (C) 2000 Simone Piccardi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/***************************************************************
*
* File gsl_histogram_oper.c:
* Routine to make operation on histograms.
* Need GSL library and header.
* Contains the routines:
* gsl_histogram_same_binning check if two histograms have the same binning
* gsl_histogram_add add two histograms
* gsl_histogram_sub subctract two histograms
* gsl_histogram_mult multiply two histograms
* gsl_histogram_div divide two histograms
* gsl_histogram_scale scale histogram contents
*
* Author: S. Piccardi
* Jan. 2000
*
***************************************************************/
#include <config.h>
#include <stdlib.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_histogram.h>
/*
* gsl_histogram_same_binning:
* control if two histograms have the
* same binning
*/
int
gsl_histogram_equal_bins_p (const gsl_histogram * h1, const gsl_histogram * h2)
{
if (h1->n != h2->n)
{
return 0;
}
{
size_t i;
/* init ranges */
for (i = 0; i <= h1->n; i++)
{
if (h1->range[i] != h2->range[i])
{
return 0;
}
}
}
return 1;
}
/*
* gsl_histogram_add:
* add two histograms
*/
int
gsl_histogram_add (gsl_histogram * h1, const gsl_histogram * h2)
{
size_t i;
if (!gsl_histogram_equal_bins_p (h1, h2))
{
GSL_ERROR ("histograms have different binning", GSL_EINVAL);
}
for (i = 0; i < h1->n; i++)
{
h1->bin[i] += h2->bin[i];
}
return GSL_SUCCESS;
}
/*
* gsl_histogram_sub:
* subtract two histograms
*/
int
gsl_histogram_sub (gsl_histogram * h1, const gsl_histogram * h2)
{
size_t i;
if (!gsl_histogram_equal_bins_p (h1, h2))
{
GSL_ERROR ("histograms have different binning", GSL_EINVAL);
}
for (i = 0; i < h1->n; i++)
{
h1->bin[i] -= h2->bin[i];
}
return GSL_SUCCESS;
}
/*
* gsl_histogram_mult:
* multiply two histograms
*/
int
gsl_histogram_mul (gsl_histogram * h1, const gsl_histogram * h2)
{
size_t i;
if (!gsl_histogram_equal_bins_p (h1, h2))
{
GSL_ERROR ("histograms have different binning", GSL_EINVAL);
}
for (i = 0; i < h1->n; i++)
{
h1->bin[i] *= h2->bin[i];
}
return GSL_SUCCESS;
}
/*
* gsl_histogram_div:
* divide two histograms
*/
int
gsl_histogram_div (gsl_histogram * h1, const gsl_histogram * h2)
{
size_t i;
if (!gsl_histogram_equal_bins_p (h1, h2))
{
GSL_ERROR ("histograms have different binning", GSL_EINVAL);
}
for (i = 0; i < h1->n; i++)
{
h1->bin[i] /= h2->bin[i];
}
return GSL_SUCCESS;
}
/*
* gsl_histogram_scale:
* scale a histogram by a numeric factor
*/
int
gsl_histogram_scale (gsl_histogram * h, double scale)
{
size_t i;
for (i = 0; i < h->n; i++)
{
h->bin[i] *= scale;
}
return GSL_SUCCESS;
}
/*
* gsl_histogram_shift:
* shift a histogram by a numeric offset
*/
int
gsl_histogram_shift (gsl_histogram * h, double shift)
{
size_t i;
for (i = 0; i < h->n; i++)
{
h->bin[i] += shift;
}
return GSL_SUCCESS;
}
|
