1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2017, 2019 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 "matrix-reader.h"
24 #include "data/casegrouper.h"
25 #include "data/casereader.h"
26 #include "data/data-out.h"
27 #include "data/dataset.h"
28 #include "data/dictionary.h"
29 #include "data/format.h"
30 #include "data/variable.h"
31 #include "language/command.h"
32 #include "libpspp/i18n.h"
33 #include "libpspp/message.h"
34 #include "libpspp/str.h"
35 #include "output/pivot-table.h"
38 #define _(msgid) gettext (msgid)
39 #define N_(msgid) msgid
44 This module interprets a "data matrix", typically generated by the command
45 MATRIX DATA. The dictionary of such a matrix takes the form:
47 s_0, s_1, ... s_m, ROWTYPE_, VARNAME_, v_0, v_1, .... v_n
49 where s_0, s_1 ... s_m are the variables defining the splits, and
50 v_0, v_1 ... v_n are the continuous variables.
54 The ROWTYPE_ variable is of type A8.
55 The VARNAME_ variable is a string type whose width is not predetermined.
56 The variables s_x are of type F4.0 (although this reader accepts any type),
57 and v_x are of any numeric type.
59 The values of the ROWTYPE_ variable are in the set {MEAN, STDDEV, N, CORR, COV}
60 and determine the purpose of that case.
61 The values of the VARNAME_ variable must correspond to the names of the varibles
62 in {v_0, v_1 ... v_n} and indicate the rows of the correlation or covariance
67 A typical example is as follows:
69 s_0 ROWTYPE_ VARNAME_ v_0 v_1 v_2
71 0 MEAN 5.0000 4.0000 3.0000
72 0 STDDEV 1.0000 2.0000 3.0000
73 0 N 9.0000 9.0000 9.0000
74 0 CORR V1 1.0000 .6000 .7000
75 0 CORR V2 .6000 1.0000 .8000
76 0 CORR V3 .7000 .8000 1.0000
77 1 MEAN 9.0000 8.0000 7.0000
78 1 STDDEV 5.0000 6.0000 7.0000
79 1 N 9.0000 9.0000 9.0000
80 1 CORR V1 1.0000 .4000 .3000
81 1 CORR V2 .4000 1.0000 .2000
82 1 CORR V3 .3000 .2000 1.0000
87 matrix_material_uninit (struct matrix_material *mm)
89 gsl_matrix_free (mm->corr);
90 gsl_matrix_free (mm->cov);
91 gsl_matrix_free (mm->n);
92 gsl_matrix_free (mm->mean_matrix);
93 gsl_matrix_free (mm->var_matrix);
96 static const struct variable *
97 find_matrix_string_var (const struct dictionary *dict, const char *name)
99 const struct variable *var = dict_lookup_var (dict, name);
102 msg (ME, _("Matrix dataset lacks a variable called %s."), name);
105 if (!var_is_alpha (var))
107 msg (ME, _("Matrix dataset variable %s should be of string type."), name);
113 struct matrix_reader *
114 matrix_reader_create (const struct dictionary *dict,
115 struct casereader *in_reader)
117 const struct variable *varname = find_matrix_string_var (dict, "VARNAME_");
118 const struct variable *rowtype = find_matrix_string_var (dict, "ROWTYPE_");
119 if (!varname || !rowtype)
122 for (size_t i = 0; i < dict_get_var_cnt (dict); i++)
124 const struct variable *v = dict_get_var (dict, i);
125 if (!var_is_numeric (v) && v != rowtype && v != varname)
127 msg (ME, _("Matrix dataset variable %s should be numeric."),
134 const struct variable **dvars = NULL;
135 dict_get_vars (dict, &dvars, &dvarcnt, DC_SCRATCH);
137 /* Continuous variables and split variables. */
138 const struct variable **cvars = dvars + var_get_dict_index (varname) + 1;
139 size_t n_cvars = dvarcnt - var_get_dict_index (varname) - 1;
140 const struct variable **svars = dvars;
141 size_t n_svars = var_get_dict_index (rowtype);
144 msg (ME, _("Matrix dataset does not have any continuous variables."));
149 struct matrix_reader *mr = xmalloc (sizeof *mr);
150 *mr = (struct matrix_reader) {
152 .cvars = xmemdup (cvars, n_cvars * sizeof *cvars),
156 .grouper = casegrouper_create_vars (in_reader, svars, n_svars)
164 matrix_reader_destroy (struct matrix_reader *mr)
168 bool ret = casegrouper_destroy (mr->grouper);
175 Allocates MATRIX if necessary,
176 and populates row MROW, from the data in C corresponding to
177 variables in VARS. N_VARS is the length of VARS.
180 matrix_fill_row (gsl_matrix **matrix,
181 const struct ccase *c, int mrow,
182 const struct variable **vars, size_t n_vars)
187 *matrix = gsl_matrix_alloc (n_vars, n_vars);
188 gsl_matrix_set_all (*matrix, SYSMIS);
191 for (col = 0; col < n_vars; ++col)
193 const struct variable *cv = vars [col];
194 double x = case_num (c, cv);
195 assert (col < (*matrix)->size2);
196 assert (mrow < (*matrix)->size1);
197 gsl_matrix_set (*matrix, mrow, col, x);
202 find_varname (const struct variable **vars, int n_vars,
205 for (int i = 0; i < n_vars; i++)
206 if (!strcasecmp (var_get_name (vars[i]), varname))
212 matrix_reader_get_string (const struct ccase *c, const struct variable *var)
214 struct substring s = case_ss (c, var);
215 ss_rtrim (&s, ss_cstr (CC_SPACES));
220 matrix_reader_set_string (struct ccase *c, const struct variable *var,
221 struct substring src)
223 struct substring dst = case_ss (c, var);
224 for (size_t i = 0; i < dst.length; i++)
225 dst.string[i] = i < src.length ? src.string[i] : ' ';
229 matrix_reader_next (struct matrix_material *mm, struct matrix_reader *mr,
230 struct casereader **groupp)
232 struct casereader *group;
233 if (!casegrouper_get_next_group (mr->grouper, &group))
235 *mm = (struct matrix_material) MATRIX_MATERIAL_INIT;
242 *groupp = casereader_clone (group);
244 const struct variable **vars = mr->cvars;
245 size_t n_vars = mr->n_cvars;
247 *mm = (struct matrix_material) {
248 .n = gsl_matrix_calloc (n_vars, n_vars),
249 .mean_matrix = gsl_matrix_calloc (n_vars, n_vars),
250 .var_matrix = gsl_matrix_calloc (n_vars, n_vars),
260 struct matrix matrices[] = {
261 { .name = "CORR", .m = &mm->corr },
262 { .name = "COV", .m = &mm->cov },
264 enum { N_MATRICES = 2 };
267 for (; (c = casereader_read (group)); case_unref (c))
269 struct substring rowtype = matrix_reader_get_string (c, mr->rowtype);
272 = (ss_equals_case (rowtype, ss_cstr ("N")) ? mm->n
273 : ss_equals_case (rowtype, ss_cstr ("MEAN")) ? mm->mean_matrix
274 : ss_equals_case (rowtype, ss_cstr ("STDDEV")) ? mm->var_matrix
278 for (int x = 0; x < n_vars; ++x)
280 double n = case_num (c, vars[x]);
281 if (v == mm->var_matrix)
283 for (int y = 0; y < n_vars; ++y)
284 gsl_matrix_set (v, y, x, n);
289 struct matrix *m = NULL;
290 for (size_t i = 0; i < N_MATRICES; i++)
291 if (ss_equals_case (rowtype, ss_cstr (matrices[i].name)))
298 struct substring varname_raw = case_ss (c, mr->varname);
299 struct substring varname = ss_cstr (
300 recode_string (UTF8, dict_get_encoding (mr->dict),
301 varname_raw.string, varname_raw.length));
302 ss_rtrim (&varname, ss_cstr (CC_SPACES));
303 varname.string[varname.length] = '\0';
305 int y = find_varname (vars, n_vars, varname.string);
309 matrix_fill_row (m->m, c, y, vars, n_vars);
313 ss_dealloc (&varname);
316 casereader_destroy (group);
318 for (size_t i = 0; i < N_MATRICES; i++)
319 if (matrices[i].good_rows && matrices[i].good_rows != n_vars)
320 msg (SW, _("%s matrix has %zu columns but %zu rows named variables "
321 "to be analyzed (and %zu rows named unknown variables)."),
322 matrices[i].name, n_vars, matrices[i].good_rows,
323 matrices[i].bad_rows);
329 cmd_debug_matrix_read (struct lexer *lexer UNUSED, struct dataset *ds)
331 struct matrix_reader *mr = matrix_reader_create (dataset_dict (ds),
336 struct pivot_table *pt = pivot_table_create ("Debug Matrix Reader");
346 const char *mm_stat_names[] = {
347 [MM_CORR] = "Correlation",
348 [MM_COV] = "Covariance",
351 [MM_STDDEV] = "Standard Deviation",
353 enum { N_STATS = sizeof mm_stat_names / sizeof *mm_stat_names };
354 for (size_t i = 0; i < 2; i++)
356 struct pivot_dimension *d = pivot_dimension_create (
358 i ? PIVOT_AXIS_COLUMN : PIVOT_AXIS_ROW,
359 i ? "Column" : "Row");
361 pivot_category_create_leaf_rc (d->root, pivot_value_new_text ("Value"),
362 PIVOT_RC_CORRELATION);
363 for (size_t j = 0; j < mr->n_cvars; j++)
364 pivot_category_create_leaf_rc (
365 d->root, pivot_value_new_variable (mr->cvars[j]),
366 PIVOT_RC_CORRELATION);
369 struct pivot_dimension *stat = pivot_dimension_create (pt, PIVOT_AXIS_ROW,
371 for (size_t i = 0; i < N_STATS; i++)
372 pivot_category_create_leaf (stat->root,
373 pivot_value_new_text (mm_stat_names[i]));
375 struct pivot_dimension *split = pivot_dimension_create (
376 pt, PIVOT_AXIS_ROW, "Split");
380 struct matrix_material mm = MATRIX_MATERIAL_INIT;
381 while (matrix_reader_next (&mm, mr, NULL))
383 pivot_category_create_leaf (split->root,
384 pivot_value_new_integer (split_num + 1));
386 const gsl_matrix *m[N_STATS] = {
390 [MM_MEAN] = mm.mean_matrix,
391 [MM_STDDEV] = mm.var_matrix,
394 for (size_t i = 0; i < N_STATS; i++)
397 if (i == MM_COV || i == MM_CORR)
399 for (size_t y = 0; y < mr->n_cvars; y++)
400 for (size_t x = 0; x < mr->n_cvars; x++)
402 pt, y + 1, x, i, split_num,
403 pivot_value_new_number (gsl_matrix_get (m[i], y, x)));
406 for (size_t x = 0; x < mr->n_cvars; x++)
408 double n = gsl_matrix_get (m[i], 0, x);
411 pivot_table_put4 (pt, 0, x, i, split_num,
412 pivot_value_new_number (n));
417 matrix_material_uninit (&mm);
419 pivot_table_submit (pt);
423 matrix_reader_destroy (mr);