1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2010, 2011, 2014 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/>. */
19 #include "language/stats/cochran.h"
22 #include <gsl/gsl_cdf.h>
25 #include "data/casereader.h"
26 #include "data/dataset.h"
27 #include "data/dictionary.h"
28 #include "data/format.h"
29 #include "data/val-type.h"
30 #include "data/variable.h"
31 #include "language/stats/npar.h"
32 #include "libpspp/cast.h"
33 #include "libpspp/message.h"
34 #include "libpspp/misc.h"
35 #include "output/tab.h"
38 #define _(msgid) gettext (msgid)
48 const struct dictionary *dict;
54 static void show_freqs_box (const struct one_sample_test *ost, const struct cochran *ch);
55 static void show_sig_box (const struct cochran *ch);
58 cochran_execute (const struct dataset *ds,
59 struct casereader *input,
60 enum mv_class exclude,
61 const struct npar_test *test,
62 bool exact UNUSED, double timer UNUSED)
64 struct one_sample_test *ct = UP_CAST (test, struct one_sample_test, parent);
67 const struct dictionary *dict = dataset_dict (ds);
68 const struct variable *weight = dict_get_weight (dict);
76 ch.hits = xcalloc (ct->n_vars, sizeof *ch.hits);
77 ch.misses = xcalloc (ct->n_vars, sizeof *ch.misses);
79 for (; (c = casereader_read (input)); case_unref (c))
81 double case_hits = 0.0;
82 const double w = weight ? case_data (c, weight)->f: 1.0;
83 for (v = 0; v < ct->n_vars; ++v)
85 const struct variable *var = ct->vars[v];
86 const union value *val = case_data (c, var);
88 if ( var_is_value_missing (var, val, exclude))
91 if ( ch.success == SYSMIS)
95 else if (ch.failure == SYSMIS && val->f != ch.success)
99 if ( ch.success == val->f)
104 else if ( ch.failure == val->f)
110 msg (MW, _("More than two values encountered. Cochran Q test will not be run."));
115 rowsq += pow2 (case_hits);
117 casereader_destroy (input);
122 for (v = 0; v < ct->n_vars; ++v)
125 c_l2 += pow2 (ch.hits[v]);
128 ch.q = ct->n_vars * c_l2;
130 ch.q *= ct->n_vars - 1;
132 ch.q /= ct->n_vars * c_l - rowsq;
134 ch.df = ct->n_vars - 1;
137 show_freqs_box (ct, &ch);
147 show_freqs_box (const struct one_sample_test *ost, const struct cochran *ct)
150 const struct variable *weight = dict_get_weight (ct->dict);
151 const struct fmt_spec *wfmt = weight ? var_get_print_format (weight) : &F_8_0;
153 const int row_headers = 1;
154 const int column_headers = 2;
155 struct tab_table *table =
156 tab_create (row_headers + 2, column_headers + ost->n_vars);
158 tab_headers (table, row_headers, 0, column_headers, 0);
160 tab_title (table, _("Frequencies"));
162 /* Vertical lines inside the box */
163 tab_box (table, 1, 0, -1, TAL_1,
164 row_headers, 0, tab_nc (table) - 1, tab_nr (table) - 1 );
166 /* Box around the table */
167 tab_box (table, TAL_2, TAL_2, -1, -1,
168 0, 0, tab_nc (table) - 1, tab_nr (table) - 1 );
170 tab_joint_text (table, 1, 0, 2, 0,
171 TAT_TITLE | TAB_CENTER, _("Value"));
173 tab_text_format (table, 1, 1, 0, _("Success (%.*g)"),
174 DBL_DIG + 1, ct->success);
175 tab_text_format (table, 2, 1, 0, _("Failure (%.*g)"),
176 DBL_DIG + 1, ct->failure);
178 tab_hline (table, TAL_2, 0, tab_nc (table) - 1, column_headers);
179 tab_vline (table, TAL_2, row_headers, 0, tab_nr (table) - 1);
181 for (i = 0 ; i < ost->n_vars ; ++i)
183 tab_text (table, 0, column_headers + i,
184 TAB_LEFT, var_to_string (ost->vars[i]));
186 tab_double (table, 1, column_headers + i, 0,
189 tab_double (table, 2, column_headers + i, 0,
190 ct->misses[i], wfmt);
199 show_sig_box (const struct cochran *ch)
201 const struct variable *weight = dict_get_weight (ch->dict);
202 const struct fmt_spec *wfmt = weight ? var_get_print_format (weight) : &F_8_0;
204 const int row_headers = 1;
205 const int column_headers = 0;
206 struct tab_table *table =
207 tab_create (row_headers + 1, column_headers + 4);
209 tab_headers (table, row_headers, 0, column_headers, 0);
211 tab_title (table, _("Test Statistics"));
213 tab_text (table, 0, column_headers,
214 TAT_TITLE | TAB_LEFT , _("N"));
216 tab_text (table, 0, 1 + column_headers,
217 TAT_TITLE | TAB_LEFT , _("Cochran's Q"));
219 tab_text (table, 0, 2 + column_headers,
220 TAT_TITLE | TAB_LEFT, _("df"));
222 tab_text (table, 0, 3 + column_headers,
223 TAT_TITLE | TAB_LEFT, _("Asymp. Sig."));
225 /* Box around the table */
226 tab_box (table, TAL_2, TAL_2, -1, -1,
227 0, 0, tab_nc (table) - 1, tab_nr (table) - 1 );
229 tab_hline (table, TAL_2, 0, tab_nc (table) -1, column_headers);
230 tab_vline (table, TAL_2, row_headers, 0, tab_nr (table) - 1);
232 tab_double (table, 1, column_headers,
235 tab_double (table, 1, column_headers + 1,
238 tab_double (table, 1, column_headers + 2,
241 tab_double (table, 1, column_headers + 3,
242 0, gsl_cdf_chisq_Q (ch->q, ch->df),