-
Notifications
You must be signed in to change notification settings - Fork 210
/
gsl-histogram.c
78 lines (66 loc) · 1.91 KB
/
gsl-histogram.c
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
/* histogram/gsl-histogram.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough
*
* This program 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 3 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <gsl/gsl_histogram.h>
int
main (int argc, char **argv)
{
double a = 0.0, b = 1.0;
size_t n = 10;
if (argc != 3 && argc !=4)
{
printf ("Usage: gsl-histogram xmin xmax [n]\n");
printf (
"Computes a histogram of the data on stdin using n bins from xmin to xmax.\n"
"If n is unspecified then bins of integer width are used.\n");
exit (0);
}
a = atof (argv[1]);
b = atof (argv[2]);
if (argc == 4)
{
n = atoi (argv[3]);
}
else
{
n = (int)(b - a) ;
}
{
double x;
gsl_histogram *h = gsl_histogram_alloc (n);
gsl_histogram_set_ranges_uniform (h, a, b);
while (fscanf(stdin, "%lg", &x) == 1)
{
gsl_histogram_increment(h, x);
}
#ifdef DISPLAY_STATS
{
double mean = gsl_histogram_mean (h);
double sigma = gsl_histogram_sigma (h);
fprintf (stdout, "# mean = %g\n", mean);
fprintf (stdout, "# sigma = %g\n", sigma);
}
#endif
gsl_histogram_fprintf (stdout, h, "%g", "%g");
gsl_histogram_free (h);
}
return 0;
}