1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2004, 2009 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/>. */
22 #include <gsl/gsl_randist.h>
25 #include <output/charts/plot-hist.h>
26 #include <output/chart-item-provider.h>
28 #include <libpspp/cast.h>
29 #include <math/histogram.h>
30 #include <math/moments.h>
33 #define _(msgid) gettext (msgid)
35 /* Plots a histogram of the data in HIST with the given LABEL.
36 Labels the histogram with each of N, MEAN, and STDDEV that is
37 not SYSMIS. If all three are not SYSMIS and SHOW_NORMAL is
38 true, also draws a normal curve on the histogram. */
40 histogram_chart_create (const gsl_histogram *hist, const char *label,
41 double n, double mean, double stddev,
44 struct histogram_chart *h;
46 h = xmalloc (sizeof *h);
47 chart_item_init (&h->chart_item, &histogram_chart_class, label);
48 h->gsl_hist = hist != NULL ? gsl_histogram_clone (hist) : NULL;
52 h->show_normal = show_normal;
53 return &h->chart_item;
57 histogram_chart_destroy (struct chart_item *chart_item)
59 struct histogram_chart *h = UP_CAST (chart_item, struct histogram_chart,
61 if (h->gsl_hist != NULL)
62 gsl_histogram_free (h->gsl_hist);
66 const struct chart_item_class histogram_chart_class =
68 histogram_chart_destroy