1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 #ifndef __HISTOGRAM_H__
18 #define __HISTOGRAM_H__
22 #include "math/statistic.h"
24 #include <gsl/gsl_histogram.h>
29 struct statistic parent;
30 gsl_histogram *gsl_hist;
34 Prepare a histogram for data which lies in the range [min, max)
35 bin_width is a nominal figure only. It is a hint about what might be
36 an good approximate bin width, but the implementation will adjust it
39 struct histogram * histogram_create (double bin_width, double min, double max);
41 void histogram_add (struct histogram *h, double y, double c);