X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fstats%2Fmeans-parser.c;fp=src%2Flanguage%2Fstats%2Fmeans-parser.c;h=73822ecce14c2588efbe7811c4fe278936ffde7a;hb=ad7ae8bb105c925b951e241fd6a3d1cb93d614a0;hp=0000000000000000000000000000000000000000;hpb=814952415c6322e9ab08376426fb99d851765e20;p=pspp
diff --git a/src/language/stats/means-parser.c b/src/language/stats/means-parser.c
new file mode 100644
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+++ b/src/language/stats/means-parser.c
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+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2011, 2012, 2013, 2019 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see . */
+
+#include
+
+#include "data/case.h"
+#include "data/casegrouper.h"
+#include "data/casereader.h"
+#include "data/dataset.h"
+#include "data/dictionary.h"
+#include "data/format.h"
+#include "data/variable.h"
+
+#include "language/command.h"
+#include "language/lexer/lexer.h"
+#include "language/lexer/variable-parser.h"
+
+#include "libpspp/hmap.h"
+#include "libpspp/bt.h"
+#include "libpspp/misc.h"
+#include "libpspp/pool.h"
+
+#include "means.h"
+
+/* Parse the /TABLES stanza of the command. */
+static bool
+parse_means_table_syntax (struct lexer *lexer, const struct means *cmd,
+ struct mtable *table)
+{
+ table->n_layers = 0;
+ table->layers = NULL;
+
+ /* Dependent variable (s) */
+ if (!parse_variables_const_pool (lexer, cmd->pool, cmd->dict,
+ &table->dep_vars, &table->n_dep_vars,
+ PV_NO_DUPLICATE | PV_NUMERIC))
+ return false;
+
+
+ /* Factor variable (s) */
+ while (lex_match (lexer, T_BY))
+ {
+ struct layer *layer = xzalloc (sizeof *layer);
+ hmap_init (&layer->instances.map);
+
+ table->n_layers++;
+ table->layers = xrealloc (table->layers,
+ table->n_layers * sizeof *table->layers);
+
+ table->layers[table->n_layers - 1] = layer;
+
+ if (!parse_variables_const_pool
+ (lexer, cmd->pool, cmd->dict,
+ &layer->factor_vars,
+ &layer->n_factor_vars,
+ PV_NO_DUPLICATE))
+ return false;
+ }
+
+ return true;
+}
+
+/* Match a variable.
+ If the match succeeds, the variable will be placed in VAR.
+ Returns true if successful */
+static bool
+lex_is_variable (struct lexer *lexer, const struct dictionary *dict,
+ int n)
+{
+ const char *tstr;
+ if (lex_next_token (lexer, n) != T_ID)
+ return false;
+
+ tstr = lex_next_tokcstr (lexer, n);
+
+ if (NULL == dict_lookup_var (dict, tstr) )
+ return false;
+
+ return true;
+}
+
+static bool
+means_parse (struct lexer *lexer, struct means *means)
+{
+ /* Optional TABLES = */
+ if (lex_match_id (lexer, "TABLES"))
+ {
+ if (! lex_force_match (lexer, T_EQUALS))
+ return false;
+ }
+
+ bool more_tables = true;
+ /* Parse the "tables" */
+ while (more_tables)
+ {
+ means->n_tables ++;
+ means->table = pool_realloc (means->pool, means->table, means->n_tables * sizeof (*means->table));
+
+ if (! parse_means_table_syntax (lexer, means,
+ &means->table[means->n_tables - 1]))
+ {
+ return false;
+ }
+
+ /* Look ahead to see if there are more tables to be parsed */
+ more_tables = false;
+ if ( T_SLASH == lex_next_token (lexer, 0) )
+ {
+ if (lex_is_variable (lexer, means->dict, 1) )
+ {
+ more_tables = true;
+ lex_match (lexer, T_SLASH);
+ }
+ }
+ }
+
+ /* /MISSING subcommand */
+ while (lex_token (lexer) != T_ENDCMD)
+ {
+ lex_match (lexer, T_SLASH);
+
+ if (lex_match_id (lexer, "MISSING"))
+ {
+ /*
+ If no MISSING subcommand is specified, each combination of
+ a dependent variable and categorical variables is handled
+ separately.
+ */
+ lex_match (lexer, T_EQUALS);
+ if (lex_match_id (lexer, "INCLUDE"))
+ {
+ /*
+ Use the subcommand "/MISSING=INCLUDE" to include user-missing
+ values in the analysis.
+ */
+
+ means->exclude = MV_SYSTEM;
+ means->dep_exclude = MV_SYSTEM;
+ }
+ else if (lex_match_id (lexer, "TABLE"))
+ /*
+ This is the default. (I think).
+ Every case containing a complete set of variables for a given
+ table. If any variable, categorical or dependent for in a table
+ is missing (as defined by what?), then that variable will
+ be dropped FOR THAT TABLE ONLY.
+ */
+ {
+ means->listwise_exclude = true;
+ }
+ else if (lex_match_id (lexer, "DEPENDENT"))
+ /*
+ Use the command "/MISSING=DEPENDENT" to
+ include user-missing values for the categorical variables,
+ while excluding them for the dependent variables.
+
+ Cases are dropped only when user-missing values
+ appear in dependent variables. User-missing
+ values for categorical variables are treated according to
+ their face value.
+
+ Cases are ALWAYS dropped when System Missing values appear
+ in the categorical variables.
+ */
+ {
+ means->dep_exclude = MV_ANY;
+ means->exclude = MV_SYSTEM;
+ }
+ else
+ {
+ lex_error (lexer, NULL);
+ return false;
+ }
+ }
+ else if (lex_match_id (lexer, "CELLS"))
+ {
+ lex_match (lexer, T_EQUALS);
+
+ /* The default values become overwritten */
+ means->n_statistics = 0;
+ free (means->statistics);
+ means->statistics = 0;
+ while (lex_token (lexer) != T_ENDCMD
+ && lex_token (lexer) != T_SLASH)
+ {
+ if (lex_match (lexer, T_ALL))
+ {
+ free (means->statistics);
+ means->statistics = xcalloc (n_MEANS_STATISTICS, sizeof (*means->statistics));
+ means->n_statistics = n_MEANS_STATISTICS;
+ int i;
+ for (i = 0; i < n_MEANS_STATISTICS; ++i)
+ {
+ means->statistics[i] = i;
+ }
+ }
+ else if (lex_match_id (lexer, "NONE"))
+ {
+ means->n_statistics = 0;
+ free (means->statistics);
+ means->statistics = 0;
+ }
+ else if (lex_match_id (lexer, "DEFAULT"))
+ {
+ means->n_statistics = 3;
+ means->statistics = xcalloc (3, sizeof *means->statistics);
+ means->statistics[0] = MEANS_MEAN;
+ means->statistics[1] = MEANS_N;
+ means->statistics[2] = MEANS_STDDEV;
+ }
+ else
+ {
+ int i;
+ for (i = 0; i < n_MEANS_STATISTICS; ++i)
+ {
+ const struct cell_spec *cs = cell_spec + i;
+ if (lex_match_id (lexer, cs->keyword))
+ {
+ means->statistics
+ = xrealloc (means->statistics,
+ (means->n_statistics + 1)
+ * sizeof (*means->statistics));
+
+ means->statistics[means->n_statistics] = i;
+ means->n_statistics++;
+ break;
+ }
+ }
+
+ if (i >= n_MEANS_STATISTICS)
+ {
+ lex_error (lexer, NULL);
+ return false;
+ }
+ }
+ }
+ }
+ else
+ {
+ lex_error (lexer, NULL);
+ return false;
+ }
+ }
+ return true;
+}
+
+int
+cmd_means (struct lexer *lexer, struct dataset *ds)
+{
+ struct means means;
+ means.pool = pool_create ();
+
+ means.exclude = MV_ANY;
+ means.dep_exclude = MV_ANY;
+ means.listwise_exclude = false;
+ means.table = NULL;
+ means.n_tables = 0;
+
+ means.dict = dataset_dict (ds);
+
+ means.n_statistics = 3;
+ means.statistics = xcalloc (3, sizeof *means.statistics);
+ means.statistics[0] = MEANS_MEAN;
+ means.statistics[1] = MEANS_N;
+ means.statistics[2] = MEANS_STDDEV;
+
+ if (! means_parse (lexer, &means))
+ goto error;
+
+ {
+ struct casegrouper *grouper;
+ struct casereader *group;
+ bool ok;
+
+ grouper = casegrouper_create_splits (proc_open (ds), means.dict);
+ while (casegrouper_get_next_group (grouper, &group))
+ {
+ run_means (&means, group, ds);
+ }
+ ok = casegrouper_destroy (grouper);
+ ok = proc_commit (ds) && ok;
+ }
+
+ for (int t = 0; t < means.n_tables; ++t)
+ {
+ const struct mtable *table = means.table + t;
+ means_shipout (table, &means);
+ }
+
+ return CMD_SUCCESS;
+
+ error:
+
+ return CMD_FAILURE;
+}
+
+
+
+
+