1 /* PSPP - computes sample statistics.
2 Copyright (C) 2006 Free Software Foundation, Inc.
3 Written by John Darrington <john@darrington.wattle.id.au>
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include <output/table.h>
22 #include <libpspp/hash.h>
23 #include <data/variable.h>
24 #include "npar-summary.h"
25 #include <math/moments.h>
26 #include <data/casefile.h>
27 #include <data/casefilter.h>
28 #include <data/case.h>
29 #include <data/dictionary.h>
34 #define _(msgid) gettext (msgid)
38 npar_summary_calc_descriptives (struct descriptives *desc,
39 const struct casefile *cf,
40 struct casefilter *filter,
41 const struct dictionary *dict,
42 const struct variable *const *vv,
49 double minimum = DBL_MAX;
50 double maximum = -DBL_MAX;
52 struct moments1 *moments = moments1_create (MOMENT_VARIANCE);
53 struct casereader *r = casefile_get_reader (cf, filter);
55 const struct variable *v = *vv++;
57 while (casereader_read(r, &c))
59 const union value *val = case_data (&c, v);
60 double w = dict_get_case_weight (dict, &c, &warn);
62 if ( ! casefilter_variable_missing (filter, &c, v ))
64 minimum = MIN (minimum, val->f);
65 maximum = MAX (maximum, val->f);
66 moments1_add (moments, val->f, w);
70 casereader_destroy (r);
72 moments1_calculate (moments,
78 desc[i].std_dev = sqrt (var);
80 moments1_destroy (moments);
82 desc[i].min = minimum;
83 desc[i].max = maximum;
92 do_summary_box (const struct descriptives *desc,
93 const struct variable *const *vv,
97 bool quartiles = false;
101 struct tab_table *table ;
104 if ( desc ) columns += 5;
105 if ( quartiles ) columns += 3;
107 table = tab_create (columns, 2 + n_vars, 0);
109 tab_dim (table, tab_natural_dimensions);
111 tab_title (table, _("Descriptive Statistics"));
113 tab_headers (table, 1, 0, 1, 0);
115 tab_box (table, TAL_1, TAL_1, -1, TAL_1,
116 0, 0, table->nc - 1, tab_nr(table) - 1 );
118 tab_hline (table, TAL_2, 0, tab_nc (table) -1, 2);
119 tab_vline (table, TAL_2, 1, 0, tab_nr (table) - 1);
124 tab_joint_text (table, col, 0, col, 1, TAT_TITLE | TAB_CENTER,
127 tab_joint_text (table, col, 0, col, 1, TAT_TITLE | TAB_CENTER,
130 tab_joint_text (table, col, 0, col, 1, TAT_TITLE | TAB_CENTER,
131 _("Std. Deviation"));
133 tab_joint_text (table, col, 0, col, 1, TAT_TITLE | TAB_CENTER,
136 tab_joint_text (table, col, 0, col, 1, TAT_TITLE | TAB_CENTER,
143 tab_joint_text (table, col, 0, col + 2, 0, TAT_TITLE | TAB_CENTER,
145 tab_hline (table, TAL_1, col, col + 2, 1);
147 tab_text (table, col, 1, TAT_TITLE | TAB_CENTER,
150 tab_text (table, col, 1, TAT_TITLE | TAB_CENTER,
153 tab_text (table, col, 1, TAT_TITLE | TAB_CENTER,
158 for ( v = 0 ; v < n_vars ; ++v )
160 tab_text (table, 0, 2 + v, TAT_NONE, var_to_string (vv[v]));
162 tab_float (table, 1, 2 + v, TAT_NONE, desc[v].n, 8, 0);
163 tab_float (table, 2, 2 + v, TAT_NONE, desc[v].mean, 8, 3);
164 tab_float (table, 3, 2 + v, TAT_NONE, desc[v].std_dev, 8, 3);
165 tab_float (table, 4, 2 + v, TAT_NONE, desc[v].min, 8, 3);
166 tab_float (table, 5, 2 + v, TAT_NONE, desc[v].max, 8, 3);