+++ /dev/null
-/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2006, 2009, 2010, 2011, 2012, 2013, 2014, 2016 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 <http://www.gnu.org/licenses/>. */
-
-/* FIXME:
-
- - How to calculate significance of some symmetric and directional measures?
- - How to calculate ASE for symmetric Somers ' d?
- - How to calculate ASE for Goodman and Kruskal's tau?
- - How to calculate approx. T of symmetric uncertainty coefficient?
-
-*/
-
-#include <config.h>
-
-#include <ctype.h>
-#include <float.h>
-#include <gsl/gsl_cdf.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include "data/case.h"
-#include "data/casegrouper.h"
-#include "data/casereader.h"
-#include "data/data-out.h"
-#include "data/dataset.h"
-#include "data/dictionary.h"
-#include "data/format.h"
-#include "data/value-labels.h"
-#include "data/variable.h"
-#include "language/command.h"
-#include "language/stats/freq.h"
-#include "language/dictionary/split-file.h"
-#include "language/lexer/lexer.h"
-#include "language/lexer/variable-parser.h"
-#include "libpspp/array.h"
-#include "libpspp/assertion.h"
-#include "libpspp/compiler.h"
-#include "libpspp/hash-functions.h"
-#include "libpspp/hmap.h"
-#include "libpspp/hmapx.h"
-#include "libpspp/message.h"
-#include "libpspp/misc.h"
-#include "libpspp/pool.h"
-#include "libpspp/str.h"
-#include "output/pivot-table.h"
-#include "output/charts/barchart.h"
-
-#include "gl/minmax.h"
-#include "gl/xalloc-oversized.h"
-#include "gl/xalloc.h"
-#include "gl/xsize.h"
-
-#include "gettext.h"
-#define _(msgid) gettext (msgid)
-#define N_(msgid) msgid
-
-/* Kinds of cells in the crosstabulation. */
-#define CRS_CELLS \
- C(COUNT, N_("Count"), PIVOT_RC_COUNT) \
- C(EXPECTED, N_("Expected"), PIVOT_RC_OTHER) \
- C(ROW, N_("Row %"), PIVOT_RC_PERCENT) \
- C(COLUMN, N_("Column %"), PIVOT_RC_PERCENT) \
- C(TOTAL, N_("Total %"), PIVOT_RC_PERCENT) \
- C(RESIDUAL, N_("Residual"), PIVOT_RC_RESIDUAL) \
- C(SRESIDUAL, N_("Std. Residual"), PIVOT_RC_RESIDUAL) \
- C(ASRESIDUAL, N_("Adjusted Residual"), PIVOT_RC_RESIDUAL)
-enum crs_cell
- {
-#define C(KEYWORD, STRING, RC) CRS_CL_##KEYWORD,
- CRS_CELLS
-#undef C
- };
-enum {
-#define C(KEYWORD, STRING, RC) + 1
- CRS_N_CELLS = CRS_CELLS
-#undef C
-};
-#define CRS_ALL_CELLS ((1u << CRS_N_CELLS) - 1)
-
-/* Kinds of statistics. */
-#define CRS_STATISTICS \
- S(CHISQ) \
- S(PHI) \
- S(CC) \
- S(LAMBDA) \
- S(UC) \
- S(BTAU) \
- S(CTAU) \
- S(RISK) \
- S(GAMMA) \
- S(D) \
- S(KAPPA) \
- S(ETA) \
- S(CORR)
-enum crs_statistic_index {
-#define S(KEYWORD) CRS_ST_##KEYWORD##_INDEX,
- CRS_STATISTICS
-#undef S
-};
-enum crs_statistic_bit {
-#define S(KEYWORD) CRS_ST_##KEYWORD = 1u << CRS_ST_##KEYWORD##_INDEX,
- CRS_STATISTICS
-#undef S
-};
-enum {
-#define S(KEYWORD) + 1
- CRS_N_STATISTICS = CRS_STATISTICS
-#undef S
-};
-#define CRS_ALL_STATISTICS ((1u << CRS_N_STATISTICS) - 1)
-
-/* Number of chi-square statistics. */
-#define N_CHISQ 5
-
-/* Number of symmetric statistics. */
-#define N_SYMMETRIC 9
-
-/* Number of directional statistics. */
-#define N_DIRECTIONAL 13
-
-/* Indexes into the 'vars' member of struct crosstabulation and
- struct crosstab member. */
-enum
- {
- ROW_VAR = 0, /* Row variable. */
- COL_VAR = 1 /* Column variable. */
- /* Higher indexes cause multiple tables to be output. */
- };
-
-struct xtab_var
- {
- const struct variable *var;
- union value *values;
- size_t n_values;
- };
-
-/* A crosstabulation of 2 or more variables. */
-struct crosstabulation
- {
- struct crosstabs_proc *proc;
- struct fmt_spec weight_format; /* Format for weight variable. */
- double missing; /* Weight of missing cases. */
-
- /* Variables (2 or more). */
- size_t n_vars;
- struct xtab_var *vars;
-
- /* Constants (0 or more). */
- size_t n_consts;
- struct xtab_var *const_vars;
- size_t *const_indexes;
-
- /* Data. */
- struct hmap data;
- struct freq **entries;
- size_t n_entries;
-
- /* Number of statistically interesting columns/rows
- (columns/rows with data in them). */
- size_t ns_cols, ns_rows;
-
- /* Matrix contents. */
- double *mat; /* Matrix proper. */
- double *row_tot; /* Row totals. */
- double *col_tot; /* Column totals. */
- double total; /* Grand total. */
-
- /* Syntax. */
- int start_ofs;
- int end_ofs;
- };
-
-/* Integer mode variable info. */
-struct var_range
- {
- struct hmap_node hmap_node; /* In struct crosstabs_proc var_ranges map. */
- const struct variable *var; /* The variable. */
- int min; /* Minimum value. */
- int max; /* Maximum value + 1. */
- int count; /* max - min. */
- };
-
-struct crosstabs_proc
- {
- const struct dictionary *dict;
- enum { INTEGER, GENERAL } mode;
- enum mv_class exclude;
- bool barchart;
- bool bad_warn;
- struct fmt_spec weight_format;
-
- /* Variables specifies on VARIABLES. */
- const struct variable **variables;
- size_t n_variables;
- struct hmap var_ranges;
-
- /* TABLES. */
- struct crosstabulation *pivots;
- size_t n_pivots;
-
- /* CELLS. */
- size_t n_cells; /* Number of cells requested. */
- unsigned int cells; /* Bit k is 1 if cell k is requested. */
- int a_cells[CRS_N_CELLS]; /* 0...n_cells-1 are the requested cells. */
-
- /* Rounding of cells. */
- bool round_case_weights; /* Round case weights? */
- bool round_cells; /* If !round_case_weights, round cells? */
- bool round_down; /* Round down? (otherwise to nearest) */
-
- /* STATISTICS. */
- unsigned int statistics; /* Bit k is 1 if statistic k is requested. */
-
- bool descending; /* True if descending sort order is requested. */
- };
-
-static bool parse_crosstabs_tables (struct lexer *, struct dataset *,
- struct crosstabs_proc *);
-static bool parse_crosstabs_variables (struct lexer *, struct dataset *,
- struct crosstabs_proc *);
-
-static const struct var_range *get_var_range (const struct crosstabs_proc *,
- const struct variable *);
-
-static bool should_tabulate_case (const struct crosstabulation *,
- const struct ccase *, enum mv_class exclude);
-static void tabulate_general_case (struct crosstabulation *, const struct ccase *,
- double weight);
-static void tabulate_integer_case (struct crosstabulation *, const struct ccase *,
- double weight);
-static void postcalc (struct crosstabs_proc *, struct lexer *);
-
-static double
-round_weight (const struct crosstabs_proc *proc, double weight)
-{
- return proc->round_down ? floor (weight) : floor (weight + 0.5);
-}
-
-#define FOR_EACH_POPULATED_COLUMN(C, XT) \
- for (size_t C = next_populated_column (0, XT); \
- C < (XT)->vars[COL_VAR].n_values; \
- C = next_populated_column (C + 1, XT))
-static size_t
-next_populated_column (size_t c, const struct crosstabulation *xt)
-{
- size_t n_columns = xt->vars[COL_VAR].n_values;
- for (; c < n_columns; c++)
- if (xt->col_tot[c])
- break;
- return c;
-}
-
-#define FOR_EACH_POPULATED_ROW(R, XT) \
- for (size_t R = next_populated_row (0, XT); R < (XT)->vars[ROW_VAR].n_values; \
- R = next_populated_row (R + 1, XT))
-static size_t
-next_populated_row (size_t r, const struct crosstabulation *xt)
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- for (; r < n_rows; r++)
- if (xt->row_tot[r])
- break;
- return r;
-}
-
-/* Parses and executes the CROSSTABS procedure. */
-int
-cmd_crosstabs (struct lexer *lexer, struct dataset *ds)
-{
- int result = CMD_FAILURE;
-
- struct crosstabs_proc proc = {
- .dict = dataset_dict (ds),
- .mode = GENERAL,
- .exclude = MV_ANY,
- .barchart = false,
- .bad_warn = true,
- .weight_format = *dict_get_weight_format (dataset_dict (ds)),
-
- .variables = NULL,
- .n_variables = 0,
- .var_ranges = HMAP_INITIALIZER (proc.var_ranges),
-
- .pivots = NULL,
- .n_pivots = 0,
-
- .cells = 1u << CRS_CL_COUNT,
- /* n_cells and a_cells will be filled in later. */
-
- .round_case_weights = false,
- .round_cells = false,
- .round_down = false,
-
- .statistics = 0,
-
- .descending = false,
- };
- bool show_tables = true;
- int exclude_ofs = 0;
- lex_match (lexer, T_SLASH);
- for (;;)
- {
- if (lex_match_id (lexer, "VARIABLES"))
- {
- if (!parse_crosstabs_variables (lexer, ds, &proc))
- goto exit;
- }
- else if (lex_match_id (lexer, "MISSING"))
- {
- lex_match (lexer, T_EQUALS);
- exclude_ofs = lex_ofs (lexer);
- if (lex_match_id (lexer, "TABLE"))
- proc.exclude = MV_ANY;
- else if (lex_match_id (lexer, "INCLUDE"))
- proc.exclude = MV_SYSTEM;
- else if (lex_match_id (lexer, "REPORT"))
- proc.exclude = 0;
- else
- {
- lex_error_expecting (lexer, "TABLE", "INCLUDE", "REPORT");
- goto exit;
- }
- }
- else if (lex_match_id (lexer, "COUNT"))
- {
- lex_match (lexer, T_EQUALS);
-
- /* Default is CELL. */
- proc.round_case_weights = false;
- proc.round_cells = true;
-
- while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
- {
- if (lex_match_id (lexer, "ASIS"))
- {
- proc.round_case_weights = false;
- proc.round_cells = false;
- }
- else if (lex_match_id (lexer, "CASE"))
- {
- proc.round_case_weights = true;
- proc.round_cells = false;
- }
- else if (lex_match_id (lexer, "CELL"))
- {
- proc.round_case_weights = false;
- proc.round_cells = true;
- }
- else if (lex_match_id (lexer, "ROUND"))
- proc.round_down = false;
- else if (lex_match_id (lexer, "TRUNCATE"))
- proc.round_down = true;
- else
- {
- lex_error_expecting (lexer, "ASIS", "CASE", "CELL",
- "ROUND", "TRUNCATE");
- goto exit;
- }
- lex_match (lexer, T_COMMA);
- }
- }
- else if (lex_match_id (lexer, "FORMAT"))
- {
- lex_match (lexer, T_EQUALS);
- while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
- {
- if (lex_match_id (lexer, "AVALUE"))
- proc.descending = false;
- else if (lex_match_id (lexer, "DVALUE"))
- proc.descending = true;
- else if (lex_match_id (lexer, "TABLES"))
- show_tables = true;
- else if (lex_match_id (lexer, "NOTABLES"))
- show_tables = false;
- else
- {
- lex_error_expecting (lexer, "AVALUE", "DVALUE",
- "TABLES", "NOTABLES");
- goto exit;
- }
- lex_match (lexer, T_COMMA);
- }
- }
- else if (lex_match_id (lexer, "BARCHART"))
- proc.barchart = true;
- else if (lex_match_id (lexer, "CELLS"))
- {
- lex_match (lexer, T_EQUALS);
-
- if (lex_match_id (lexer, "NONE"))
- proc.cells = 0;
- else if (lex_match (lexer, T_ALL))
- proc.cells = CRS_ALL_CELLS;
- else
- {
- proc.cells = 0;
- while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
- {
-#define C(KEYWORD, STRING, RC) \
- if (lex_match_id (lexer, #KEYWORD)) \
- { \
- proc.cells |= 1u << CRS_CL_##KEYWORD; \
- continue; \
- }
- CRS_CELLS
-#undef C
-
- static const char *cells[] =
- {
-#define C(KEYWORD, STRING, RC) #KEYWORD,
- CRS_CELLS
-#undef C
- };
- lex_error_expecting_array (lexer, cells,
- sizeof cells / sizeof *cells);
- goto exit;
- }
- if (!proc.cells)
- proc.cells = ((1u << CRS_CL_COUNT) | (1u << CRS_CL_ROW)
- | (1u << CRS_CL_COLUMN) | (1u << CRS_CL_TOTAL));
- }
- }
- else if (lex_match_id (lexer, "STATISTICS"))
- {
- lex_match (lexer, T_EQUALS);
-
- if (lex_match_id (lexer, "NONE"))
- proc.statistics = 0;
- else if (lex_match (lexer, T_ALL))
- proc.statistics = CRS_ALL_STATISTICS;
- else
- {
- proc.statistics = 0;
- while (lex_token (lexer) != T_SLASH && lex_token (lexer) != T_ENDCMD)
- {
-#define S(KEYWORD) \
- if (lex_match_id (lexer, #KEYWORD)) \
- { \
- proc.statistics |= CRS_ST_##KEYWORD; \
- continue; \
- }
- CRS_STATISTICS
-#undef S
- static const char *stats[] =
- {
-#define S(KEYWORD) #KEYWORD,
- CRS_STATISTICS
-#undef S
- };
- lex_error_expecting_array (lexer, stats,
- sizeof stats / sizeof *stats);
- goto exit;
- }
- if (!proc.statistics)
- proc.statistics = CRS_ST_CHISQ;
- }
- }
- else if (!parse_crosstabs_tables (lexer, ds, &proc))
- goto exit;
-
- if (!lex_match (lexer, T_SLASH))
- break;
- }
- if (!lex_end_of_command (lexer))
- goto exit;
-
- if (!proc.n_pivots)
- {
- msg (SE, _("At least one crosstabulation must be requested (using "
- "the TABLES subcommand)."));
- goto exit;
- }
-
- /* Cells. */
- if (!show_tables)
- proc.cells = 0;
- for (size_t i = 0; i < CRS_N_CELLS; i++)
- if (proc.cells & (1u << i))
- proc.a_cells[proc.n_cells++] = i;
- assert (proc.n_cells < CRS_N_CELLS);
-
- /* Missing values. */
- if (proc.mode == GENERAL && !proc.exclude)
- {
- lex_ofs_msg (lexer, SW, exclude_ofs, exclude_ofs,
- _("Missing mode %s not allowed in general mode. "
- "Assuming %s."), "REPORT", "MISSING=TABLE");
- proc.exclude = MV_ANY;
- }
-
- struct casereader *input = casereader_create_filter_weight (proc_open (ds),
- dataset_dict (ds),
- NULL, NULL);
- struct casegrouper *grouper = casegrouper_create_splits (input, dataset_dict (ds));
- struct casereader *group;
- while (casegrouper_get_next_group (grouper, &group))
- {
- output_split_file_values_peek (ds, group);
-
- /* Initialize hash tables. */
- for (struct crosstabulation *xt = &proc.pivots[0];
- xt < &proc.pivots[proc.n_pivots]; xt++)
- hmap_init (&xt->data);
-
- /* Tabulate. */
- struct ccase *c;
- for (; (c = casereader_read (group)) != NULL; case_unref (c))
- for (struct crosstabulation *xt = &proc.pivots[0];
- xt < &proc.pivots[proc.n_pivots]; xt++)
- {
- double weight = dict_get_case_weight (dataset_dict (ds), c,
- &proc.bad_warn);
- if (proc.round_case_weights)
- {
- weight = round_weight (&proc, weight);
- if (weight == 0.)
- continue;
- }
- if (should_tabulate_case (xt, c, proc.exclude))
- {
- if (proc.mode == GENERAL)
- tabulate_general_case (xt, c, weight);
- else
- tabulate_integer_case (xt, c, weight);
- }
- else
- xt->missing += weight;
- }
- casereader_destroy (group);
-
- /* Output. */
- postcalc (&proc, lexer);
- }
- bool ok = casegrouper_destroy (grouper);
- ok = proc_commit (ds) && ok;
-
- result = ok ? CMD_SUCCESS : CMD_FAILURE;
-
-exit:
- free (proc.variables);
-
- struct var_range *range, *next_range;
- HMAP_FOR_EACH_SAFE (range, next_range, struct var_range, hmap_node,
- &proc.var_ranges)
- {
- hmap_delete (&proc.var_ranges, &range->hmap_node);
- free (range);
- }
- for (struct crosstabulation *xt = &proc.pivots[0];
- xt < &proc.pivots[proc.n_pivots]; xt++)
- {
- free (xt->vars);
- free (xt->const_vars);
- free (xt->const_indexes);
- }
- free (proc.pivots);
-
- return result;
-}
-
-/* Parses the TABLES subcommand. */
-static bool
-parse_crosstabs_tables (struct lexer *lexer, struct dataset *ds,
- struct crosstabs_proc *proc)
-{
- const struct variable ***by = NULL;
- size_t *by_nvar = NULL;
- bool ok = false;
-
- /* Ensure that this is a TABLES subcommand. */
- if (!lex_match_id (lexer, "TABLES")
- && (lex_token (lexer) != T_ID ||
- dict_lookup_var (dataset_dict (ds), lex_tokcstr (lexer)) == NULL)
- && lex_token (lexer) != T_ALL)
- {
- lex_error (lexer, _("Syntax error expecting subcommand name or "
- "variable name."));
- return false;
- }
- lex_match (lexer, T_EQUALS);
-
- struct const_var_set *var_set
- = (proc->variables
- ? const_var_set_create_from_array (proc->variables,
- proc->n_variables)
- : const_var_set_create_from_dict (dataset_dict (ds)));
-
- size_t nx = 1;
- size_t n_by = 0;
- int vars_start = lex_ofs (lexer);
- do
- {
- by = xnrealloc (by, n_by + 1, sizeof *by);
- by_nvar = xnrealloc (by_nvar, n_by + 1, sizeof *by_nvar);
- if (!parse_const_var_set_vars (lexer, var_set, &by[n_by], &by_nvar[n_by],
- PV_NO_DUPLICATE | PV_NO_SCRATCH))
- goto done;
- size_t n = by_nvar[n_by++];
- if (xalloc_oversized (nx, n))
- {
- lex_ofs_error (
- lexer, vars_start, lex_ofs (lexer) - 1,
- _("Too many cross-tabulation variables or dimensions."));
- goto done;
- }
- nx *= n;
- }
- while (lex_match (lexer, T_BY));
- if (n_by < 2)
- {
- bool unused UNUSED = lex_force_match (lexer, T_BY);
- goto done;
- }
- int vars_end = lex_ofs (lexer) - 1;
-
- size_t *by_iter = XCALLOC (n_by, size_t);
- proc->pivots = xnrealloc (proc->pivots,
- proc->n_pivots + nx, sizeof *proc->pivots);
- for (size_t i = 0; i < nx; i++)
- {
- struct crosstabulation *xt = &proc->pivots[proc->n_pivots++];
-
- *xt = (struct crosstabulation) {
- .proc = proc,
- .weight_format = proc->weight_format,
- .missing = 0.,
- .n_vars = n_by,
- .vars = xcalloc (n_by, sizeof *xt->vars),
- .n_consts = 0,
- .const_vars = NULL,
- .const_indexes = NULL,
- .start_ofs = vars_start,
- .end_ofs = vars_end,
- };
-
- for (size_t j = 0; j < n_by; j++)
- xt->vars[j].var = by[j][by_iter[j]];
-
- for (int j = n_by - 1; j >= 0; j--)
- {
- if (++by_iter[j] < by_nvar[j])
- break;
- by_iter[j] = 0;
- }
- }
- free (by_iter);
- ok = true;
-
-done:
- /* All return paths lead here. */
- for (size_t i = 0; i < n_by; i++)
- free (by[i]);
- free (by);
- free (by_nvar);
-
- const_var_set_destroy (var_set);
-
- return ok;
-}
-
-/* Parses the VARIABLES subcommand. */
-static bool
-parse_crosstabs_variables (struct lexer *lexer, struct dataset *ds,
- struct crosstabs_proc *proc)
-{
- if (proc->n_pivots)
- {
- lex_next_error (lexer, -1, -1, _("%s must be specified before %s."),
- "VARIABLES", "TABLES");
- return false;
- }
-
- lex_match (lexer, T_EQUALS);
-
- for (;;)
- {
- size_t orig_nv = proc->n_variables;
-
- if (!parse_variables_const (lexer, dataset_dict (ds),
- &proc->variables, &proc->n_variables,
- (PV_APPEND | PV_NUMERIC
- | PV_NO_DUPLICATE | PV_NO_SCRATCH)))
- return false;
-
- if (!lex_force_match (lexer, T_LPAREN))
- goto error;
-
- if (!lex_force_int (lexer))
- goto error;
- long min = lex_integer (lexer);
- lex_get (lexer);
-
- lex_match (lexer, T_COMMA);
-
- if (!lex_force_int_range (lexer, NULL, min, LONG_MAX))
- goto error;
- long max = lex_integer (lexer);
- lex_get (lexer);
-
- if (!lex_force_match (lexer, T_RPAREN))
- goto error;
-
- for (size_t i = orig_nv; i < proc->n_variables; i++)
- {
- const struct variable *var = proc->variables[i];
- struct var_range *vr = xmalloc (sizeof *vr);
- *vr = (struct var_range) {
- .var = var,
- .min = min,
- .max = max,
- .count = max - min + 1,
- };
- hmap_insert (&proc->var_ranges, &vr->hmap_node,
- hash_pointer (var, 0));
- }
-
- if (lex_token (lexer) == T_SLASH)
- break;
- }
-
- proc->mode = INTEGER;
- return true;
-
- error:
- free (proc->variables);
- proc->variables = NULL;
- proc->n_variables = 0;
- return false;
-}
-\f
-/* Data file processing. */
-
-static const struct var_range *
-get_var_range (const struct crosstabs_proc *proc, const struct variable *var)
-{
- if (!hmap_is_empty (&proc->var_ranges))
- {
- const struct var_range *range;
-
- HMAP_FOR_EACH_IN_BUCKET (range, struct var_range, hmap_node,
- hash_pointer (var, 0), &proc->var_ranges)
- if (range->var == var)
- return range;
- }
-
- return NULL;
-}
-
-static bool
-should_tabulate_case (const struct crosstabulation *xt, const struct ccase *c,
- enum mv_class exclude)
-{
- for (size_t j = 0; j < xt->n_vars; j++)
- {
- const struct variable *var = xt->vars[j].var;
- const struct var_range *range = get_var_range (xt->proc, var);
-
- if (var_is_value_missing (var, case_data (c, var)) & exclude)
- return false;
-
- if (range != NULL)
- {
- double num = case_num (c, var);
- if (num < range->min || num >= range->max + 1.)
- return false;
- }
- }
- return true;
-}
-
-static void
-tabulate_integer_case (struct crosstabulation *xt, const struct ccase *c,
- double weight)
-{
- size_t hash = 0;
- for (size_t j = 0; j < xt->n_vars; j++)
- {
- /* Throw away fractional parts of values. */
- hash = hash_int (case_num (c, xt->vars[j].var), hash);
- }
-
- struct freq *te;
- HMAP_FOR_EACH_WITH_HASH (te, struct freq, node, hash, &xt->data)
- {
- for (size_t j = 0; j < xt->n_vars; j++)
- if ((int) case_num (c, xt->vars[j].var) != (int) te->values[j].f)
- goto no_match;
-
- /* Found an existing entry. */
- te->count += weight;
- return;
-
- no_match: ;
- }
-
- /* No existing entry. Create a new one. */
- te = xmalloc (table_entry_size (xt->n_vars));
- te->count = weight;
- for (size_t j = 0; j < xt->n_vars; j++)
- te->values[j].f = (int) case_num (c, xt->vars[j].var);
- hmap_insert (&xt->data, &te->node, hash);
-}
-
-static void
-tabulate_general_case (struct crosstabulation *xt, const struct ccase *c,
- double weight)
-{
- size_t hash = 0;
- for (size_t j = 0; j < xt->n_vars; j++)
- {
- const struct variable *var = xt->vars[j].var;
- hash = value_hash (case_data (c, var), var_get_width (var), hash);
- }
-
- struct freq *te;
- HMAP_FOR_EACH_WITH_HASH (te, struct freq, node, hash, &xt->data)
- {
- for (size_t j = 0; j < xt->n_vars; j++)
- {
- const struct variable *var = xt->vars[j].var;
- if (!value_equal (case_data (c, var), &te->values[j],
- var_get_width (var)))
- goto no_match;
- }
-
- /* Found an existing entry. */
- te->count += weight;
- return;
-
- no_match: ;
- }
-
- /* No existing entry. Create a new one. */
- te = xmalloc (table_entry_size (xt->n_vars));
- te->count = weight;
- for (size_t j = 0; j < xt->n_vars; j++)
- {
- const struct variable *var = xt->vars[j].var;
- value_clone (&te->values[j], case_data (c, var), var_get_width (var));
- }
- hmap_insert (&xt->data, &te->node, hash);
-}
-\f
-/* Post-data reading calculations. */
-
-static int compare_table_entry_vars_3way (const struct freq *a,
- const struct freq *b,
- const struct crosstabulation *xt,
- int idx0, int idx1);
-static int compare_table_entry_3way (const void *ap_, const void *bp_,
- const void *xt_);
-static int compare_table_entry_3way_inv (const void *ap_, const void *bp_,
- const void *xt_);
-
-static void enum_var_values (const struct crosstabulation *, int var_idx,
- bool descending);
-static void free_var_values (const struct crosstabulation *, int var_idx);
-static void output_crosstabulation (struct crosstabs_proc *,
- struct crosstabulation *,
- struct lexer *);
-static void make_crosstabulation_subset (struct crosstabulation *xt,
- size_t row0, size_t row1,
- struct crosstabulation *subset);
-static void make_summary_table (struct crosstabs_proc *);
-static bool find_crosstab (struct crosstabulation *, size_t *row0p,
- size_t *row1p);
-
-static void
-postcalc (struct crosstabs_proc *proc, struct lexer *lexer)
-{
- /* Round hash table entries, if requested
-
- If this causes any of the cell counts to fall to zero, delete those
- cells. */
- if (proc->round_cells)
- for (struct crosstabulation *xt = proc->pivots;
- xt < &proc->pivots[proc->n_pivots]; xt++)
- {
- struct freq *e, *next;
- HMAP_FOR_EACH_SAFE (e, next, struct freq, node, &xt->data)
- {
- e->count = round_weight (proc, e->count);
- if (e->count == 0.0)
- {
- hmap_delete (&xt->data, &e->node);
- free (e);
- }
- }
- }
-
- /* Convert hash tables into sorted arrays of entries. */
- for (struct crosstabulation *xt = proc->pivots;
- xt < &proc->pivots[proc->n_pivots]; xt++)
- {
- xt->n_entries = hmap_count (&xt->data);
- xt->entries = xnmalloc (xt->n_entries, sizeof *xt->entries);
-
- size_t i = 0;
- struct freq *e;
- HMAP_FOR_EACH (e, struct freq, node, &xt->data)
- xt->entries[i++] = e;
-
- hmap_destroy (&xt->data);
-
- sort (xt->entries, xt->n_entries, sizeof *xt->entries,
- proc->descending ? compare_table_entry_3way_inv : compare_table_entry_3way,
- xt);
- }
-
- make_summary_table (proc);
-
- /* Output each pivot table. */
- for (struct crosstabulation *xt = proc->pivots;
- xt < &proc->pivots[proc->n_pivots]; xt++)
- {
- output_crosstabulation (proc, xt, lexer);
- if (proc->barchart)
- {
- int n_vars = (xt->n_vars > 2 ? 2 : xt->n_vars);
- const struct variable **vars = XCALLOC (n_vars, const struct variable*);
- for (size_t i = 0; i < n_vars; i++)
- vars[i] = xt->vars[i].var;
- chart_submit (barchart_create (vars, n_vars, _("Count"),
- false,
- xt->entries, xt->n_entries));
- free (vars);
- }
- }
-
- /* Free output and prepare for next split file. */
- for (struct crosstabulation *xt = proc->pivots;
- xt < &proc->pivots[proc->n_pivots]; xt++)
- {
- xt->missing = 0.0;
-
- /* Free the members that were allocated in this function(and the values
- owned by the entries.
-
- The other pointer members are either both allocated and destroyed at a
- lower level (in output_crosstabulation), or both allocated and
- destroyed at a higher level (in crs_custom_tables and free_proc,
- respectively). */
- for (size_t i = 0; i < xt->n_vars; i++)
- {
- int width = var_get_width (xt->vars[i].var);
- if (value_needs_init (width))
- for (size_t j = 0; j < xt->n_entries; j++)
- value_destroy (&xt->entries[j]->values[i], width);
- }
-
- for (size_t i = 0; i < xt->n_entries; i++)
- free (xt->entries[i]);
- free (xt->entries);
- }
-}
-
-static void
-make_crosstabulation_subset (struct crosstabulation *xt, size_t row0,
- size_t row1, struct crosstabulation *subset)
-{
- *subset = *xt;
- if (xt->n_vars > 2)
- {
- assert (xt->n_consts == 0);
- subset->n_vars = 2;
- subset->vars = xt->vars;
-
- subset->n_consts = xt->n_vars - 2;
- subset->const_vars = xt->vars + 2;
- subset->const_indexes = xcalloc (subset->n_consts,
- sizeof *subset->const_indexes);
- for (size_t i = 0; i < subset->n_consts; i++)
- {
- const union value *value = &xt->entries[row0]->values[2 + i];
-
- for (size_t j = 0; j < xt->vars[2 + i].n_values; j++)
- if (value_equal (&xt->vars[2 + i].values[j], value,
- var_get_width (xt->vars[2 + i].var)))
- {
- subset->const_indexes[i] = j;
- goto found;
- }
- NOT_REACHED ();
- found: ;
- }
- }
- subset->entries = &xt->entries[row0];
- subset->n_entries = row1 - row0;
-}
-
-static int
-compare_table_entry_var_3way (const struct freq *a,
- const struct freq *b,
- const struct crosstabulation *xt,
- int idx)
-{
- return value_compare_3way (&a->values[idx], &b->values[idx],
- var_get_width (xt->vars[idx].var));
-}
-
-static int
-compare_table_entry_vars_3way (const struct freq *a,
- const struct freq *b,
- const struct crosstabulation *xt,
- int idx0, int idx1)
-{
- for (int i = idx1 - 1; i >= idx0; i--)
- {
- int cmp = compare_table_entry_var_3way (a, b, xt, i);
- if (cmp != 0)
- return cmp;
- }
- return 0;
-}
-
-/* Compare the struct freq at *AP to the one at *BP and
- return a strcmp()-type result. */
-static int
-compare_table_entry_3way (const void *ap_, const void *bp_, const void *xt_)
-{
- const struct freq *const *ap = ap_;
- const struct freq *const *bp = bp_;
- const struct freq *a = *ap;
- const struct freq *b = *bp;
- const struct crosstabulation *xt = xt_;
-
- int cmp = compare_table_entry_vars_3way (a, b, xt, 2, xt->n_vars);
- if (cmp != 0)
- return cmp;
-
- cmp = compare_table_entry_var_3way (a, b, xt, ROW_VAR);
- if (cmp != 0)
- return cmp;
-
- return compare_table_entry_var_3way (a, b, xt, COL_VAR);
-}
-
-/* Inverted version of compare_table_entry_3way */
-static int
-compare_table_entry_3way_inv (const void *ap_, const void *bp_, const void *xt_)
-{
- return -compare_table_entry_3way (ap_, bp_, xt_);
-}
-
-/* Output a table summarizing the cases processed. */
-static void
-make_summary_table (struct crosstabs_proc *proc)
-{
- struct pivot_table *table = pivot_table_create (N_("Summary"));
- pivot_table_set_weight_var (table, dict_get_weight (proc->dict));
-
- pivot_dimension_create (table, PIVOT_AXIS_COLUMN, N_("Statistics"),
- N_("N"), PIVOT_RC_COUNT,
- N_("Percent"), PIVOT_RC_PERCENT);
-
- struct pivot_dimension *cases = pivot_dimension_create (
- table, PIVOT_AXIS_COLUMN, N_("Cases"),
- N_("Valid"), N_("Missing"), N_("Total"));
- cases->root->show_label = true;
-
- struct pivot_dimension *tables = pivot_dimension_create (
- table, PIVOT_AXIS_ROW, N_("Crosstabulation"));
- for (struct crosstabulation *xt = &proc->pivots[0];
- xt < &proc->pivots[proc->n_pivots]; xt++)
- {
- struct string name = DS_EMPTY_INITIALIZER;
- for (size_t i = 0; i < xt->n_vars; i++)
- {
- if (i > 0)
- ds_put_cstr (&name, " × ");
- ds_put_cstr (&name, var_to_string (xt->vars[i].var));
- }
-
- int row = pivot_category_create_leaf (
- tables->root,
- pivot_value_new_user_text_nocopy (ds_steal_cstr (&name)));
-
- double valid = 0.;
- for (size_t i = 0; i < xt->n_entries; i++)
- valid += xt->entries[i]->count;
-
- double n[3];
- n[0] = valid;
- n[1] = xt->missing;
- n[2] = n[0] + n[1];
- for (int i = 0; i < 3; i++)
- {
- pivot_table_put3 (table, 0, i, row, pivot_value_new_number (n[i]));
- pivot_table_put3 (table, 1, i, row,
- pivot_value_new_number (n[i] / n[2] * 100.0));
- }
- }
-
- pivot_table_submit (table);
-}
-\f
-/* Output. */
-
-static struct pivot_table *create_crosstab_table (
- struct crosstabs_proc *, struct crosstabulation *,
- size_t crs_leaves[CRS_N_CELLS]);
-static struct pivot_table *create_chisq_table (struct crosstabulation *);
-static struct pivot_table *create_sym_table (struct crosstabulation *);
-static struct pivot_table *create_risk_table (
- struct crosstabulation *, struct pivot_dimension **risk_statistics);
-static struct pivot_table *create_direct_table (struct crosstabulation *);
-static void display_crosstabulation (struct crosstabs_proc *,
- struct crosstabulation *,
- struct pivot_table *,
- size_t crs_leaves[CRS_N_CELLS]);
-static void display_chisq (struct crosstabulation *, struct pivot_table *);
-static void display_symmetric (struct crosstabs_proc *,
- struct crosstabulation *, struct pivot_table *);
-static void display_risk (struct crosstabulation *, struct pivot_table *,
- struct pivot_dimension *risk_statistics);
-static void display_directional (struct crosstabs_proc *,
- struct crosstabulation *,
- struct pivot_table *);
-static void delete_missing (struct crosstabulation *);
-static void build_matrix (struct crosstabulation *);
-
-/* Output pivot table XT in the context of PROC. */
-static void
-output_crosstabulation (struct crosstabs_proc *proc, struct crosstabulation *xt,
- struct lexer *lexer)
-{
- for (size_t i = 0; i < xt->n_vars; i++)
- enum_var_values (xt, i, proc->descending);
-
- if (xt->vars[COL_VAR].n_values == 0)
- {
- struct string vars;
-
- ds_init_cstr (&vars, var_to_string (xt->vars[0].var));
- for (size_t i = 1; i < xt->n_vars; i++)
- ds_put_format (&vars, " × %s", var_to_string (xt->vars[i].var));
-
- /* TRANSLATORS: The %s here describes a crosstabulation. It takes the
- form "var1 * var2 * var3 * ...". */
- lex_ofs_msg (lexer, SW, xt->start_ofs, xt->end_ofs,
- _("Crosstabulation %s contained no non-missing cases."),
- ds_cstr (&vars));
-
- ds_destroy (&vars);
- for (size_t i = 0; i < xt->n_vars; i++)
- free_var_values (xt, i);
- return;
- }
-
- size_t crs_leaves[CRS_N_CELLS];
- struct pivot_table *table = (proc->cells
- ? create_crosstab_table (proc, xt, crs_leaves)
- : NULL);
- struct pivot_table *chisq = (proc->statistics & CRS_ST_CHISQ
- ? create_chisq_table (xt)
- : NULL);
- struct pivot_table *sym
- = (proc->statistics & (CRS_ST_PHI | CRS_ST_CC | CRS_ST_BTAU | CRS_ST_CTAU
- | CRS_ST_GAMMA | CRS_ST_CORR | CRS_ST_KAPPA)
- ? create_sym_table (xt)
- : NULL);
- struct pivot_dimension *risk_statistics = NULL;
- struct pivot_table *risk = (proc->statistics & CRS_ST_RISK
- ? create_risk_table (xt, &risk_statistics)
- : NULL);
- struct pivot_table *direct
- = (proc->statistics & (CRS_ST_LAMBDA | CRS_ST_UC | CRS_ST_D | CRS_ST_ETA)
- ? create_direct_table (xt)
- : NULL);
-
- size_t row0 = 0;
- size_t row1 = 0;
- while (find_crosstab (xt, &row0, &row1))
- {
- struct crosstabulation x;
-
- make_crosstabulation_subset (xt, row0, row1, &x);
-
- size_t n_rows = x.vars[ROW_VAR].n_values;
- size_t n_cols = x.vars[COL_VAR].n_values;
- if (size_overflow_p (xtimes (xtimes (n_rows, n_cols), sizeof (double))))
- xalloc_die ();
- x.row_tot = xmalloc (n_rows * sizeof *x.row_tot);
- x.col_tot = xmalloc (n_cols * sizeof *x.col_tot);
- x.mat = xmalloc (n_rows * n_cols * sizeof *x.mat);
-
- build_matrix (&x);
-
- /* Find the first variable that differs from the last subtable. */
- if (table)
- display_crosstabulation (proc, &x, table, crs_leaves);
-
- if (proc->exclude == 0)
- delete_missing (&x);
-
- if (chisq)
- display_chisq (&x, chisq);
-
- if (sym)
- display_symmetric (proc, &x, sym);
- if (risk)
- display_risk (&x, risk, risk_statistics);
- if (direct)
- display_directional (proc, &x, direct);
-
- free (x.mat);
- free (x.row_tot);
- free (x.col_tot);
- free (x.const_indexes);
- }
-
- if (table)
- pivot_table_submit (table);
-
- if (chisq)
- pivot_table_submit (chisq);
-
- if (sym)
- pivot_table_submit (sym);
-
- if (risk)
- {
- if (!pivot_table_is_empty (risk))
- pivot_table_submit (risk);
- else
- pivot_table_unref (risk);
- }
-
- if (direct)
- pivot_table_submit (direct);
-
- for (size_t i = 0; i < xt->n_vars; i++)
- free_var_values (xt, i);
-}
-
-static void
-build_matrix (struct crosstabulation *x)
-{
- const int col_var_width = var_get_width (x->vars[COL_VAR].var);
- const int row_var_width = var_get_width (x->vars[ROW_VAR].var);
- size_t n_rows = x->vars[ROW_VAR].n_values;
- size_t n_cols = x->vars[COL_VAR].n_values;
-
- double *mp = x->mat;
- size_t col = 0;
- size_t row = 0;
- for (struct freq **p = x->entries; p < &x->entries[x->n_entries]; p++)
- {
- const struct freq *te = *p;
-
- while (!value_equal (&x->vars[ROW_VAR].values[row],
- &te->values[ROW_VAR], row_var_width))
- {
- for (; col < n_cols; col++)
- *mp++ = 0.0;
- col = 0;
- row++;
- }
-
- while (!value_equal (&x->vars[COL_VAR].values[col],
- &te->values[COL_VAR], col_var_width))
- {
- *mp++ = 0.0;
- col++;
- }
-
- *mp++ = te->count;
- if (++col >= n_cols)
- {
- col = 0;
- row++;
- }
- }
- while (mp < &x->mat[n_cols * n_rows])
- *mp++ = 0.0;
- assert (mp == &x->mat[n_cols * n_rows]);
-
- /* Column totals, row totals, ns_rows. */
- mp = x->mat;
- for (col = 0; col < n_cols; col++)
- x->col_tot[col] = 0.0;
- for (row = 0; row < n_rows; row++)
- x->row_tot[row] = 0.0;
- x->ns_rows = 0;
- for (row = 0; row < n_rows; row++)
- {
- bool row_is_empty = true;
- for (col = 0; col < n_cols; col++)
- {
- if (*mp != 0.0)
- {
- row_is_empty = false;
- x->col_tot[col] += *mp;
- x->row_tot[row] += *mp;
- }
- mp++;
- }
- if (!row_is_empty)
- x->ns_rows++;
- }
- assert (mp == &x->mat[n_cols * n_rows]);
-
- /* ns_cols. */
- x->ns_cols = 0;
- for (col = 0; col < n_cols; col++)
- for (row = 0; row < n_rows; row++)
- if (x->mat[col + row * n_cols] != 0.0)
- {
- x->ns_cols++;
- break;
- }
-
- /* Grand total. */
- x->total = 0.0;
- for (col = 0; col < n_cols; col++)
- x->total += x->col_tot[col];
-}
-
-static void
-add_var_dimension (struct pivot_table *table, const struct xtab_var *var,
- enum pivot_axis_type axis_type, bool total)
-{
- struct pivot_dimension *d = pivot_dimension_create__ (
- table, axis_type, pivot_value_new_variable (var->var));
-
- struct pivot_footnote *missing_footnote = pivot_table_create_footnote (
- table, pivot_value_new_text (N_("Missing value")));
-
- struct pivot_category *group = pivot_category_create_group__ (
- d->root, pivot_value_new_variable (var->var));
- for (size_t j = 0; j < var->n_values; j++)
- {
- struct pivot_value *value = pivot_value_new_var_value (
- var->var, &var->values[j]);
- if (var_is_value_missing (var->var, &var->values[j]))
- pivot_value_add_footnote (value, missing_footnote);
- pivot_category_create_leaf (group, value);
- }
-
- if (total)
- pivot_category_create_leaf (d->root, pivot_value_new_text (N_("Total")));
-}
-
-static struct pivot_table *
-create_crosstab_table (struct crosstabs_proc *proc, struct crosstabulation *xt,
- size_t crs_leaves[CRS_N_CELLS])
-{
- /* Title. */
- struct string title = DS_EMPTY_INITIALIZER;
- for (size_t i = 0; i < xt->n_vars; i++)
- {
- if (i)
- ds_put_cstr (&title, " × ");
- ds_put_cstr (&title, var_to_string (xt->vars[i].var));
- }
- for (size_t i = 0; i < xt->n_consts; i++)
- {
- const struct variable *var = xt->const_vars[i].var;
- const union value *value = &xt->entries[0]->values[2 + i];
- char *s;
-
- ds_put_format (&title, ", %s=", var_to_string (var));
-
- /* Insert the formatted value of VAR without any leading spaces. */
- s = data_out (value, var_get_encoding (var), var_get_print_format (var),
- settings_get_fmt_settings ());
- ds_put_cstr (&title, s + strspn (s, " "));
- free (s);
- }
- struct pivot_table *table = pivot_table_create__ (
- pivot_value_new_user_text_nocopy (ds_steal_cstr (&title)),
- "Crosstabulation");
- pivot_table_set_weight_format (table, &proc->weight_format);
-
- struct pivot_dimension *statistics = pivot_dimension_create (
- table, PIVOT_AXIS_ROW, N_("Statistics"));
-
- struct statistic
- {
- const char *label;
- const char *rc;
- };
- static const struct statistic stats[CRS_N_CELLS] =
- {
-#define C(KEYWORD, STRING, RC) { STRING, RC },
- CRS_CELLS
-#undef C
- };
- for (size_t i = 0; i < CRS_N_CELLS; i++)
- if (proc->cells & (1u << i) && stats[i].label)
- crs_leaves[i] = pivot_category_create_leaf_rc (
- statistics->root, pivot_value_new_text (stats[i].label),
- stats[i].rc);
-
- for (size_t i = 0; i < xt->n_vars; i++)
- add_var_dimension (table, &xt->vars[i],
- i == COL_VAR ? PIVOT_AXIS_COLUMN : PIVOT_AXIS_ROW,
- true);
-
- return table;
-}
-
-static struct pivot_table *
-create_chisq_table (struct crosstabulation *xt)
-{
- struct pivot_table *chisq = pivot_table_create (N_("Chi-Square Tests"));
- pivot_table_set_weight_format (chisq, &xt->weight_format);
-
- pivot_dimension_create (
- chisq, PIVOT_AXIS_ROW, N_("Statistics"),
- N_("Pearson Chi-Square"),
- N_("Likelihood Ratio"),
- N_("Fisher's Exact Test"),
- N_("Continuity Correction"),
- N_("Linear-by-Linear Association"),
- N_("N of Valid Cases"), PIVOT_RC_COUNT);
-
- pivot_dimension_create (
- chisq, PIVOT_AXIS_COLUMN, N_("Statistics"),
- N_("Value"), PIVOT_RC_OTHER,
- N_("df"), PIVOT_RC_COUNT,
- N_("Asymptotic Sig. (2-tailed)"), PIVOT_RC_SIGNIFICANCE,
- N_("Exact Sig. (2-tailed)"), PIVOT_RC_SIGNIFICANCE,
- N_("Exact Sig. (1-tailed)"), PIVOT_RC_SIGNIFICANCE);
-
- for (size_t i = 2; i < xt->n_vars; i++)
- add_var_dimension (chisq, &xt->vars[i], PIVOT_AXIS_ROW, false);
-
- return chisq;
-}
-
-/* Symmetric measures. */
-static struct pivot_table *
-create_sym_table (struct crosstabulation *xt)
-{
- struct pivot_table *sym = pivot_table_create (N_("Symmetric Measures"));
- pivot_table_set_weight_format (sym, &xt->weight_format);
-
- pivot_dimension_create (
- sym, PIVOT_AXIS_COLUMN, N_("Values"),
- N_("Value"), PIVOT_RC_OTHER,
- N_("Asymp. Std. Error"), PIVOT_RC_OTHER,
- N_("Approx. T"), PIVOT_RC_OTHER,
- N_("Approx. Sig."), PIVOT_RC_SIGNIFICANCE);
-
- struct pivot_dimension *statistics = pivot_dimension_create (
- sym, PIVOT_AXIS_ROW, N_("Statistics"));
- pivot_category_create_group (
- statistics->root, N_("Nominal by Nominal"),
- N_("Phi"), N_("Cramer's V"), N_("Contingency Coefficient"));
- pivot_category_create_group (
- statistics->root, N_("Ordinal by Ordinal"),
- N_("Kendall's tau-b"), N_("Kendall's tau-c"),
- N_("Gamma"), N_("Spearman Correlation"));
- pivot_category_create_group (
- statistics->root, N_("Interval by Interval"),
- N_("Pearson's R"));
- pivot_category_create_group (
- statistics->root, N_("Measure of Agreement"),
- N_("Kappa"));
- pivot_category_create_leaves (statistics->root, N_("N of Valid Cases"),
- PIVOT_RC_COUNT);
-
- for (size_t i = 2; i < xt->n_vars; i++)
- add_var_dimension (sym, &xt->vars[i], PIVOT_AXIS_ROW, false);
-
- return sym;
-}
-
-/* Risk estimate. */
-static struct pivot_table *
-create_risk_table (struct crosstabulation *xt,
- struct pivot_dimension **risk_statistics)
-{
- struct pivot_table *risk = pivot_table_create (N_("Risk Estimate"));
- pivot_table_set_weight_format (risk, &xt->weight_format);
-
- struct pivot_dimension *values = pivot_dimension_create (
- risk, PIVOT_AXIS_COLUMN, N_("Values"),
- N_("Value"), PIVOT_RC_OTHER);
- pivot_category_create_group (
- /* xgettext:no-c-format */
- values->root, N_("95% Confidence Interval"),
- N_("Lower"), PIVOT_RC_OTHER,
- N_("Upper"), PIVOT_RC_OTHER);
-
- *risk_statistics = pivot_dimension_create (
- risk, PIVOT_AXIS_ROW, N_("Statistics"));
-
- for (size_t i = 2; i < xt->n_vars; i++)
- add_var_dimension (risk, &xt->vars[i], PIVOT_AXIS_ROW, false);
-
- return risk;
-}
-
-static void
-create_direct_stat (struct pivot_category *parent,
- const struct crosstabulation *xt,
- const char *name, bool symmetric)
-{
- struct pivot_category *group = pivot_category_create_group (
- parent, name);
- if (symmetric)
- pivot_category_create_leaf (group, pivot_value_new_text (N_("Symmetric")));
-
- char *row_label = xasprintf (_("%s Dependent"),
- var_to_string (xt->vars[ROW_VAR].var));
- pivot_category_create_leaf (group, pivot_value_new_user_text_nocopy (
- row_label));
-
- char *col_label = xasprintf (_("%s Dependent"),
- var_to_string (xt->vars[COL_VAR].var));
- pivot_category_create_leaf (group, pivot_value_new_user_text_nocopy (
- col_label));
-}
-
-/* Directional measures. */
-static struct pivot_table *
-create_direct_table (struct crosstabulation *xt)
-{
- struct pivot_table *direct = pivot_table_create (N_("Directional Measures"));
- pivot_table_set_weight_format (direct, &xt->weight_format);
-
- pivot_dimension_create (
- direct, PIVOT_AXIS_COLUMN, N_("Values"),
- N_("Value"), PIVOT_RC_OTHER,
- N_("Asymp. Std. Error"), PIVOT_RC_OTHER,
- N_("Approx. T"), PIVOT_RC_OTHER,
- N_("Approx. Sig."), PIVOT_RC_SIGNIFICANCE);
-
- struct pivot_dimension *statistics = pivot_dimension_create (
- direct, PIVOT_AXIS_ROW, N_("Statistics"));
- struct pivot_category *nn = pivot_category_create_group (
- statistics->root, N_("Nominal by Nominal"));
- create_direct_stat (nn, xt, N_("Lambda"), true);
- create_direct_stat (nn, xt, N_("Goodman and Kruskal tau"), false);
- create_direct_stat (nn, xt, N_("Uncertainty Coefficient"), true);
- struct pivot_category *oo = pivot_category_create_group (
- statistics->root, N_("Ordinal by Ordinal"));
- create_direct_stat (oo, xt, N_("Somers' d"), true);
- struct pivot_category *ni = pivot_category_create_group (
- statistics->root, N_("Nominal by Interval"));
- create_direct_stat (ni, xt, N_("Eta"), false);
-
- for (size_t i = 2; i < xt->n_vars; i++)
- add_var_dimension (direct, &xt->vars[i], PIVOT_AXIS_ROW, false);
-
- return direct;
-}
-
-/* Delete missing rows and columns for statistical analysis when
- /MISSING=REPORT. */
-static void
-delete_missing (struct crosstabulation *xt)
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- size_t n_cols = xt->vars[COL_VAR].n_values;
-
- for (size_t r = 0; r < n_rows; r++)
- if (var_is_num_missing (xt->vars[ROW_VAR].var,
- xt->vars[ROW_VAR].values[r].f) == MV_USER)
- {
- for (size_t c = 0; c < n_cols; c++)
- xt->mat[c + r * n_cols] = 0.;
- xt->ns_rows--;
- }
-
-
- for (size_t c = 0; c < n_cols; c++)
- if (var_is_num_missing (xt->vars[COL_VAR].var,
- xt->vars[COL_VAR].values[c].f) == MV_USER)
- {
- for (size_t r = 0; r < n_rows; r++)
- xt->mat[c + r * n_cols] = 0.;
- xt->ns_cols--;
- }
-}
-
-static bool
-find_crosstab (struct crosstabulation *xt, size_t *row0p, size_t *row1p)
-{
- size_t row0 = *row1p;
- if (row0 >= xt->n_entries)
- return false;
-
- size_t row1;
- for (row1 = row0 + 1; row1 < xt->n_entries; row1++)
- {
- struct freq *a = xt->entries[row0];
- struct freq *b = xt->entries[row1];
- if (compare_table_entry_vars_3way (a, b, xt, 2, xt->n_vars) != 0)
- break;
- }
- *row0p = row0;
- *row1p = row1;
- return true;
-}
-
-/* Compares `union value's A_ and B_ and returns a strcmp()-like
- result. WIDTH_ points to an int which is either 0 for a
- numeric value or a string width for a string value. */
-static int
-compare_value_3way (const void *a_, const void *b_, const void *width_)
-{
- const union value *a = a_;
- const union value *b = b_;
- const int *width = width_;
-
- return value_compare_3way (a, b, *width);
-}
-
-/* Inverted version of the above */
-static int
-compare_value_3way_inv (const void *a_, const void *b_, const void *width_)
-{
- return -compare_value_3way (a_, b_, width_);
-}
-
-
-/* Given an array of ENTRY_CNT table_entry structures starting at
- ENTRIES, creates a sorted list of the values that the variable
- with index VAR_IDX takes on. Stores the array of the values in
- XT->values and the number of values in XT->n_values. */
-static void
-enum_var_values (const struct crosstabulation *xt, int var_idx,
- bool descending)
-{
- struct xtab_var *xv = &xt->vars[var_idx];
- const struct var_range *range = get_var_range (xt->proc, xv->var);
-
- if (range)
- {
- xv->values = xnmalloc (range->count, sizeof *xv->values);
- xv->n_values = range->count;
- for (size_t i = 0; i < range->count; i++)
- xv->values[i].f = range->min + i;
- }
- else
- {
- int width = var_get_width (xv->var);
- struct hmapx set = HMAPX_INITIALIZER (set);
-
- for (size_t i = 0; i < xt->n_entries; i++)
- {
- const struct freq *te = xt->entries[i];
- const union value *value = &te->values[var_idx];
- size_t hash = value_hash (value, width, 0);
-
- const union value *iter;
- struct hmapx_node *node;
- HMAPX_FOR_EACH_WITH_HASH (iter, node, hash, &set)
- if (value_equal (iter, value, width))
- goto next_entry;
-
- hmapx_insert (&set, (union value *) value, hash);
-
- next_entry: ;
- }
-
- xv->n_values = hmapx_count (&set);
- xv->values = xnmalloc (xv->n_values, sizeof *xv->values);
- size_t i = 0;
- const union value *iter;
- struct hmapx_node *node;
- HMAPX_FOR_EACH (iter, node, &set)
- xv->values[i++] = *iter;
- hmapx_destroy (&set);
-
- sort (xv->values, xv->n_values, sizeof *xv->values,
- descending ? compare_value_3way_inv : compare_value_3way,
- &width);
- }
-}
-
-static void
-free_var_values (const struct crosstabulation *xt, int var_idx)
-{
- struct xtab_var *xv = &xt->vars[var_idx];
- free (xv->values);
- xv->values = NULL;
- xv->n_values = 0;
-}
-
-/* Displays the crosstabulation table. */
-static void
-display_crosstabulation (struct crosstabs_proc *proc,
- struct crosstabulation *xt, struct pivot_table *table,
- size_t crs_leaves[CRS_N_CELLS])
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- size_t n_cols = xt->vars[COL_VAR].n_values;
-
- size_t *indexes = xnmalloc (table->n_dimensions, sizeof *indexes);
- assert (xt->n_vars == 2);
- for (size_t i = 0; i < xt->n_consts; i++)
- indexes[i + 3] = xt->const_indexes[i];
-
- /* Put in the actual cells. */
- double *mp = xt->mat;
- for (size_t r = 0; r < n_rows; r++)
- {
- if (!xt->row_tot[r] && proc->mode != INTEGER)
- continue;
-
- indexes[ROW_VAR + 1] = r;
- for (size_t c = 0; c < n_cols; c++)
- {
- if (!xt->col_tot[c] && proc->mode != INTEGER)
- continue;
-
- indexes[COL_VAR + 1] = c;
-
- double expected_value = xt->row_tot[r] * xt->col_tot[c] / xt->total;
- double residual = *mp - expected_value;
- double sresidual = residual / sqrt (expected_value);
- double asresidual
- = residual / sqrt (expected_value
- * (1. - xt->row_tot[r] / xt->total)
- * (1. - xt->col_tot[c] / xt->total));
- double entries[CRS_N_CELLS] = {
- [CRS_CL_COUNT] = *mp,
- [CRS_CL_ROW] = *mp / xt->row_tot[r] * 100.,
- [CRS_CL_COLUMN] = *mp / xt->col_tot[c] * 100.,
- [CRS_CL_TOTAL] = *mp / xt->total * 100.,
- [CRS_CL_EXPECTED] = expected_value,
- [CRS_CL_RESIDUAL] = residual,
- [CRS_CL_SRESIDUAL] = sresidual,
- [CRS_CL_ASRESIDUAL] = asresidual,
- };
- for (size_t i = 0; i < proc->n_cells; i++)
- {
- int cell = proc->a_cells[i];
- indexes[0] = crs_leaves[cell];
- pivot_table_put (table, indexes, table->n_dimensions,
- pivot_value_new_number (entries[cell]));
- }
-
- mp++;
- }
- }
-
- /* Row totals. */
- for (size_t r = 0; r < n_rows; r++)
- {
- if (!xt->row_tot[r] && proc->mode != INTEGER)
- continue;
-
- double expected_value = xt->row_tot[r] / xt->total;
- double entries[CRS_N_CELLS] = {
- [CRS_CL_COUNT] = xt->row_tot[r],
- [CRS_CL_ROW] = 100.0,
- [CRS_CL_COLUMN] = expected_value * 100.,
- [CRS_CL_TOTAL] = expected_value * 100.,
- [CRS_CL_EXPECTED] = expected_value,
- [CRS_CL_RESIDUAL] = SYSMIS,
- [CRS_CL_SRESIDUAL] = SYSMIS,
- [CRS_CL_ASRESIDUAL] = SYSMIS,
- };
- for (size_t i = 0; i < proc->n_cells; i++)
- {
- int cell = proc->a_cells[i];
- double entry = entries[cell];
- if (entry != SYSMIS)
- {
- indexes[ROW_VAR + 1] = r;
- indexes[COL_VAR + 1] = n_cols;
- indexes[0] = crs_leaves[cell];
- pivot_table_put (table, indexes, table->n_dimensions,
- pivot_value_new_number (entry));
- }
- }
- }
-
- for (size_t c = 0; c <= n_cols; c++)
- {
- if (c < n_cols && !xt->col_tot[c] && proc->mode != INTEGER)
- continue;
-
- double ct = c < n_cols ? xt->col_tot[c] : xt->total;
- double expected_value = ct / xt->total;
- double entries[CRS_N_CELLS] = {
- [CRS_CL_COUNT] = ct,
- [CRS_CL_ROW] = expected_value * 100.0,
- [CRS_CL_COLUMN] = 100.0,
- [CRS_CL_TOTAL] = expected_value * 100.,
- [CRS_CL_EXPECTED] = expected_value,
- [CRS_CL_RESIDUAL] = SYSMIS,
- [CRS_CL_SRESIDUAL] = SYSMIS,
- [CRS_CL_ASRESIDUAL] = SYSMIS,
- };
- for (size_t i = 0; i < proc->n_cells; i++)
- {
- size_t cell = proc->a_cells[i];
- double entry = entries[cell];
- if (entry != SYSMIS)
- {
- indexes[ROW_VAR + 1] = n_rows;
- indexes[COL_VAR + 1] = c;
- indexes[0] = crs_leaves[cell];
- pivot_table_put (table, indexes, table->n_dimensions,
- pivot_value_new_number (entry));
- }
- }
- }
-
- free (indexes);
-}
-
-static void calc_r (struct crosstabulation *,
- double *XT, double *Y, double *, double *, double *);
-static void calc_chisq (struct crosstabulation *,
- double[N_CHISQ], int[N_CHISQ], double *, double *);
-
-/* Display chi-square statistics. */
-static void
-display_chisq (struct crosstabulation *xt, struct pivot_table *chisq)
-{
- double chisq_v[N_CHISQ];
- double fisher1, fisher2;
- int df[N_CHISQ];
- calc_chisq (xt, chisq_v, df, &fisher1, &fisher2);
-
- size_t *indexes = xnmalloc (chisq->n_dimensions, sizeof *indexes);
- assert (xt->n_vars == 2);
- for (size_t i = 0; i < xt->n_consts; i++)
- indexes[i + 2] = xt->const_indexes[i];
- for (size_t i = 0; i < N_CHISQ; i++)
- {
- indexes[0] = i;
-
- double entries[5] = { SYSMIS, SYSMIS, SYSMIS, SYSMIS, SYSMIS };
- if (i == 2)
- {
- entries[3] = fisher2;
- entries[4] = fisher1;
- }
- else if (chisq_v[i] != SYSMIS)
- {
- entries[0] = chisq_v[i];
- entries[1] = df[i];
- entries[2] = gsl_cdf_chisq_Q (chisq_v[i], df[i]);
- }
-
- for (size_t j = 0; j < sizeof entries / sizeof *entries; j++)
- if (entries[j] != SYSMIS)
- {
- indexes[1] = j;
- pivot_table_put (chisq, indexes, chisq->n_dimensions,
- pivot_value_new_number (entries[j]));
- }
- }
-
- indexes[0] = 5;
- indexes[1] = 0;
- pivot_table_put (chisq, indexes, chisq->n_dimensions,
- pivot_value_new_number (xt->total));
-
- free (indexes);
-}
-
-static bool calc_symmetric (struct crosstabs_proc *, struct crosstabulation *,
- double[N_SYMMETRIC], double[N_SYMMETRIC],
- double[N_SYMMETRIC],
- double[3], double[3], double[3]);
-
-/* Display symmetric measures. */
-static void
-display_symmetric (struct crosstabs_proc *proc, struct crosstabulation *xt,
- struct pivot_table *sym)
-{
- double sym_v[N_SYMMETRIC], sym_ase[N_SYMMETRIC], sym_t[N_SYMMETRIC];
- double somers_d_v[3], somers_d_ase[3], somers_d_t[3];
-
- if (!calc_symmetric (proc, xt, sym_v, sym_ase, sym_t,
- somers_d_v, somers_d_ase, somers_d_t))
- return;
-
- size_t *indexes = xnmalloc (sym->n_dimensions, sizeof *indexes);
- assert (xt->n_vars == 2);
- for (size_t i = 0; i < xt->n_consts; i++)
- indexes[i + 2] = xt->const_indexes[i];
-
- for (size_t i = 0; i < N_SYMMETRIC; i++)
- {
- if (sym_v[i] == SYSMIS)
- continue;
-
- indexes[1] = i;
-
- double entries[] = { sym_v[i], sym_ase[i], sym_t[i] };
- for (size_t j = 0; j < sizeof entries / sizeof *entries; j++)
- if (entries[j] != SYSMIS)
- {
- indexes[0] = j;
- pivot_table_put (sym, indexes, sym->n_dimensions,
- pivot_value_new_number (entries[j]));
- }
- }
-
- indexes[1] = N_SYMMETRIC;
- indexes[0] = 0;
- struct pivot_value *total = pivot_value_new_number (xt->total);
- pivot_value_set_rc (sym, total, PIVOT_RC_COUNT);
- pivot_table_put (sym, indexes, sym->n_dimensions, total);
-
- free (indexes);
-}
-
-static bool calc_risk (struct crosstabulation *,
- double[], double[], double[], union value *,
- double *);
-
-/* Display risk estimate. */
-static void
-display_risk (struct crosstabulation *xt, struct pivot_table *risk,
- struct pivot_dimension *risk_statistics)
-{
- double risk_v[3], lower[3], upper[3], n_valid;
- union value c[2];
- if (!calc_risk (xt, risk_v, upper, lower, c, &n_valid))
- return;
- assert (risk_statistics);
-
- size_t *indexes = xnmalloc (risk->n_dimensions, sizeof *indexes);
- assert (xt->n_vars == 2);
- for (size_t i = 0; i < xt->n_consts; i++)
- indexes[i + 2] = xt->const_indexes[i];
-
- for (size_t i = 0; i < 3; i++)
- {
- const struct variable *cv = xt->vars[COL_VAR].var;
- const struct variable *rv = xt->vars[ROW_VAR].var;
-
- if (risk_v[i] == SYSMIS)
- continue;
-
- struct string label = DS_EMPTY_INITIALIZER;
- switch (i)
- {
- case 0:
- ds_put_format (&label, _("Odds Ratio for %s"), var_to_string (rv));
- ds_put_cstr (&label, " (");
- var_append_value_name (rv, &c[0], &label);
- ds_put_cstr (&label, " / ");
- var_append_value_name (rv, &c[1], &label);
- ds_put_cstr (&label, ")");
- break;
- case 1:
- case 2:
- ds_put_format (&label, _("For cohort %s = "), var_to_string (cv));
- var_append_value_name (cv, &xt->vars[ROW_VAR].values[i - 1], &label);
- break;
- }
-
- indexes[1] = pivot_category_create_leaf (
- risk_statistics->root,
- pivot_value_new_user_text_nocopy (ds_steal_cstr (&label)));
-
- double entries[] = { risk_v[i], lower[i], upper[i] };
- for (size_t j = 0; j < sizeof entries / sizeof *entries; j++)
- {
- indexes[0] = j;
- pivot_table_put (risk, indexes, risk->n_dimensions,
- pivot_value_new_number (entries[i]));
- }
- }
- indexes[1] = pivot_category_create_leaf (
- risk_statistics->root,
- pivot_value_new_text (N_("N of Valid Cases")));
- indexes[0] = 0;
- pivot_table_put (risk, indexes, risk->n_dimensions,
- pivot_value_new_number (n_valid));
- free (indexes);
-}
-
-static void calc_directional (struct crosstabs_proc *, struct crosstabulation *,
- double[N_DIRECTIONAL], double[N_DIRECTIONAL],
- double[N_DIRECTIONAL], double[N_DIRECTIONAL]);
-
-/* Display directional measures. */
-static void
-display_directional (struct crosstabs_proc *proc,
- struct crosstabulation *xt, struct pivot_table *direct)
-{
- double direct_v[N_DIRECTIONAL];
- double direct_ase[N_DIRECTIONAL];
- double direct_t[N_DIRECTIONAL];
- double sig[N_DIRECTIONAL];
- calc_directional (proc, xt, direct_v, direct_ase, direct_t, sig);
-
- size_t *indexes = xnmalloc (direct->n_dimensions, sizeof *indexes);
- assert (xt->n_vars == 2);
- for (size_t i = 0; i < xt->n_consts; i++)
- indexes[i + 2] = xt->const_indexes[i];
-
- for (size_t i = 0; i < N_DIRECTIONAL; i++)
- {
- if (direct_v[i] == SYSMIS)
- continue;
-
- indexes[1] = i;
-
- double entries[] = {
- direct_v[i], direct_ase[i], direct_t[i], sig[i],
- };
- for (size_t j = 0; j < sizeof entries / sizeof *entries; j++)
- if (entries[j] != SYSMIS)
- {
- indexes[0] = j;
- pivot_table_put (direct, indexes, direct->n_dimensions,
- pivot_value_new_number (entries[j]));
- }
- }
-
- free (indexes);
-}
-\f
-/* Statistical calculations. */
-
-/* Returns the value of the logarithm of gamma (factorial) function for an integer
- argument XT. */
-static double
-log_gamma_int (double xt)
-{
- double r = 0;
- for (int i = 2; i < xt; i++)
- r += log(i);
- return r;
-}
-
-/* Calculate P_r as specified in _SPSS Statistical Algorithms_,
- Appendix 5. */
-static inline double
-Pr (int a, int b, int c, int d)
-{
- return exp (log_gamma_int (a + b + 1.) - log_gamma_int (a + 1.)
- + log_gamma_int (c + d + 1.) - log_gamma_int (b + 1.)
- + log_gamma_int (a + c + 1.) - log_gamma_int (c + 1.)
- + log_gamma_int (b + d + 1.) - log_gamma_int (d + 1.)
- - log_gamma_int (a + b + c + d + 1.));
-}
-
-/* Swap the contents of A and B. */
-static inline void
-swap (int *a, int *b)
-{
- int t = *a;
- *a = *b;
- *b = t;
-}
-
-/* Calculate significance for Fisher's exact test as specified in
- _SPSS Statistical Algorithms_, Appendix 5. */
-static void
-calc_fisher (int a, int b, int c, int d, double *fisher1, double *fisher2)
-{
- if (MIN (c, d) < MIN (a, b))
- swap (&a, &c), swap (&b, &d);
- if (MIN (b, d) < MIN (a, c))
- swap (&a, &b), swap (&c, &d);
- if (b * c < a * d)
- {
- if (b < c)
- swap (&a, &b), swap (&c, &d);
- else
- swap (&a, &c), swap (&b, &d);
- }
-
- double pn1 = Pr (a, b, c, d);
- *fisher1 = pn1;
- for (int xt = 1; xt <= a; xt++)
- *fisher1 += Pr (a - xt, b + xt, c + xt, d - xt);
-
- *fisher2 = *fisher1;
- for (int xt = 1; xt <= b; xt++)
- {
- double p = Pr (a + xt, b - xt, c - xt, d + xt);
- if (p < pn1)
- *fisher2 += p;
- }
-}
-
-/* Calculates chi-squares into CHISQ. MAT is a matrix with N_COLS
- columns with values COLS and N_ROWS rows with values ROWS. Values
- in the matrix sum to xt->total. */
-static void
-calc_chisq (struct crosstabulation *xt,
- double chisq[N_CHISQ], int df[N_CHISQ],
- double *fisher1, double *fisher2)
-{
- chisq[0] = chisq[1] = 0.;
- chisq[2] = chisq[3] = chisq[4] = SYSMIS;
- *fisher1 = *fisher2 = SYSMIS;
-
- df[0] = df[1] = (xt->ns_cols - 1) * (xt->ns_rows - 1);
-
- if (xt->ns_rows <= 1 || xt->ns_cols <= 1)
- {
- chisq[0] = chisq[1] = SYSMIS;
- return;
- }
-
- size_t n_cols = xt->vars[COL_VAR].n_values;
- FOR_EACH_POPULATED_ROW (r, xt)
- FOR_EACH_POPULATED_COLUMN (c, xt)
- {
- const double expected = xt->row_tot[r] * xt->col_tot[c] / xt->total;
- const double freq = xt->mat[n_cols * r + c];
- const double residual = freq - expected;
-
- chisq[0] += residual * residual / expected;
- if (freq)
- chisq[1] += freq * log (expected / freq);
- }
-
- if (chisq[0] == 0.)
- chisq[0] = SYSMIS;
-
- if (chisq[1] != 0.)
- chisq[1] *= -2.;
- else
- chisq[1] = SYSMIS;
-
- /* Calculate Yates and Fisher exact test. */
- if (xt->ns_cols == 2 && xt->ns_rows == 2)
- {
- int nz_cols[2];
-
- size_t j = 0;
- FOR_EACH_POPULATED_COLUMN (c, xt)
- {
- nz_cols[j++] = c;
- if (j == 2)
- break;
- }
- assert (j == 2);
-
- double f11 = xt->mat[nz_cols[0]];
- double f12 = xt->mat[nz_cols[1]];
- double f21 = xt->mat[nz_cols[0] + n_cols];
- double f22 = xt->mat[nz_cols[1] + n_cols];
-
- /* Yates. */
- const double xt_ = fabs (f11 * f22 - f12 * f21) - 0.5 * xt->total;
-
- if (xt_ > 0.)
- chisq[3] = (xt->total * pow2 (xt_)
- / (f11 + f12) / (f21 + f22)
- / (f11 + f21) / (f12 + f22));
- else
- chisq[3] = 0.;
-
- df[3] = 1.;
-
- /* Fisher. */
- calc_fisher (f11 + .5, f12 + .5, f21 + .5, f22 + .5, fisher1, fisher2);
- }
-
- /* Calculate Mantel-Haenszel. */
- if (var_is_numeric (xt->vars[ROW_VAR].var)
- && var_is_numeric (xt->vars[COL_VAR].var))
- {
- double r, ase_0, ase_1;
- calc_r (xt, (double *) xt->vars[ROW_VAR].values,
- (double *) xt->vars[COL_VAR].values,
- &r, &ase_0, &ase_1);
-
- chisq[4] = (xt->total - 1.) * r * r;
- df[4] = 1;
- }
-}
-
-/* Calculate the value of Pearson's r. r is stored into R, its T value into
- T, and standard error into ERROR. The row and column values must be
- passed in XT and Y. */
-static void
-calc_r (struct crosstabulation *xt,
- double *XT, double *Y, double *r, double *t, double *error)
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- size_t n_cols = xt->vars[COL_VAR].n_values;
-
- double sum_XYf = 0;
- for (size_t i = 0; i < n_rows; i++)
- for (size_t j = 0; j < n_cols; j++)
- {
- double fij = xt->mat[j + i * n_cols];
- double product = XT[i] * Y[j];
- double temp = fij * product;
- sum_XYf += temp;
- }
-
- double sum_Xr = 0;
- double sum_X2r = 0;
- for (size_t i = 0; i < n_rows; i++)
- {
- sum_Xr += XT[i] * xt->row_tot[i];
- sum_X2r += pow2 (XT[i]) * xt->row_tot[i];
- }
- double Xbar = sum_Xr / xt->total;
-
- double sum_Yc = 0;
- double sum_Y2c = 0;
- for (size_t i = 0; i < n_cols; i++)
- {
- sum_Yc += Y[i] * xt->col_tot[i];
- sum_Y2c += Y[i] * Y[i] * xt->col_tot[i];
- }
- double Ybar = sum_Yc / xt->total;
-
- double S = sum_XYf - sum_Xr * sum_Yc / xt->total;
- double SX = sum_X2r - pow2 (sum_Xr) / xt->total;
- double SY = sum_Y2c - pow2 (sum_Yc) / xt->total;
- double T = sqrt (SX * SY);
- *r = S / T;
- *t = *r / sqrt (1 - pow2 (*r)) * sqrt (xt->total - 2);
-
- double s = 0;
- double c = 0;
- for (size_t i = 0; i < n_rows; i++)
- for (size_t j = 0; j < n_cols; j++)
- {
- double Xresid = XT[i] - Xbar;
- double Yresid = Y[j] - Ybar;
- double temp = (T * Xresid * Yresid
- - ((S / (2. * T))
- * (Xresid * Xresid * SY + Yresid * Yresid * SX)));
- double y = xt->mat[j + i * n_cols] * temp * temp - c;
- double t = s + y;
- c = (t - s) - y;
- s = t;
- }
- *error = sqrt (s) / (T * T);
-}
-
-/* Calculate symmetric statistics and their asymptotic standard
- errors. Returns false if none could be calculated. */
-static bool
-calc_symmetric (struct crosstabs_proc *proc, struct crosstabulation *xt,
- double v[N_SYMMETRIC], double ase[N_SYMMETRIC],
- double t[N_SYMMETRIC],
- double somers_d_v[3], double somers_d_ase[3],
- double somers_d_t[3])
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- size_t n_cols = xt->vars[COL_VAR].n_values;
-
- size_t q = MIN (xt->ns_rows, xt->ns_cols);
- if (q <= 1)
- return false;
-
- for (size_t i = 0; i < N_SYMMETRIC; i++)
- v[i] = ase[i] = t[i] = SYSMIS;
-
- /* Phi, Cramer's V, contingency coefficient. */
- if (proc->statistics & (CRS_ST_PHI | CRS_ST_CC))
- {
- double Xp = 0.; /* Pearson chi-square. */
-
- FOR_EACH_POPULATED_ROW (r, xt)
- FOR_EACH_POPULATED_COLUMN (c, xt)
- {
- double expected = xt->row_tot[r] * xt->col_tot[c] / xt->total;
- double freq = xt->mat[n_cols * r + c];
- double residual = freq - expected;
-
- Xp += residual * residual / expected;
- }
-
- if (proc->statistics & CRS_ST_PHI)
- {
- v[0] = sqrt (Xp / xt->total);
- v[1] = sqrt (Xp / (xt->total * (q - 1)));
- }
- if (proc->statistics & CRS_ST_CC)
- v[2] = sqrt (Xp / (Xp + xt->total));
- }
-
- if (proc->statistics & (CRS_ST_BTAU | CRS_ST_CTAU
- | CRS_ST_GAMMA | CRS_ST_D))
- {
- double Dr = pow2 (xt->total);
- for (size_t r = 0; r < n_rows; r++)
- Dr -= pow2 (xt->row_tot[r]);
-
- double Dc = pow2 (xt->total);
- for (size_t c = 0; c < n_cols; c++)
- Dc -= pow2 (xt->col_tot[c]);
-
- double *cum = xnmalloc (n_cols * n_rows, sizeof *cum);
- for (size_t c = 0; c < n_cols; c++)
- {
- double ct = 0.;
-
- for (size_t r = 0; r < n_rows; r++)
- cum[c + r * n_cols] = ct += xt->mat[c + r * n_cols];
- }
-
- /* P and Q. */
- double P = 0;
- double Q = 0;
- for (size_t i = 0; i < n_rows; i++)
- {
- double Cij = 0;
- for (size_t j = 1; j < n_cols; j++)
- Cij += xt->col_tot[j] - cum[j + i * n_cols];
-
- double Dij = 0;
- if (i > 0)
- for (size_t j = 1; j < n_cols; j++)
- Dij += cum[j + (i - 1) * n_cols];
-
- for (size_t j = 0;;)
- {
- double fij = xt->mat[j + i * n_cols];
- P += fij * Cij;
- Q += fij * Dij;
-
- if (++j >= n_cols)
- break;
-
- Cij -= xt->col_tot[j] - cum[j + i * n_cols];
- Dij += xt->col_tot[j - 1] - cum[j - 1 + i * n_cols];
-
- if (i > 0)
- {
- Cij += cum[j - 1 + (i - 1) * n_cols];
- Dij -= cum[j + (i - 1) * n_cols];
- }
- }
- }
-
- if (proc->statistics & CRS_ST_BTAU)
- v[3] = (P - Q) / sqrt (Dr * Dc);
- if (proc->statistics & CRS_ST_CTAU)
- v[4] = (q * (P - Q)) / (pow2 (xt->total) * (q - 1));
- if (proc->statistics & CRS_ST_GAMMA)
- v[5] = (P - Q) / (P + Q);
-
- /* ASE for tau-b, tau-c, gamma. Calculations could be
- eliminated here, at expense of memory. */
- double btau_cum = 0;
- double ctau_cum = 0;
- double gamma_cum = 0;
- double d_yx_cum = 0;
- double d_xy_cum = 0;
- for (size_t i = 0; i < n_rows; i++)
- {
- double Cij = 0;
- for (size_t j = 1; j < n_cols; j++)
- Cij += xt->col_tot[j] - cum[j + i * n_cols];
-
- double Dij = 0;
- if (i > 0)
- for (size_t j = 1; j < n_cols; j++)
- Dij += cum[j + (i - 1) * n_cols];
-
- for (size_t j = 0;;)
- {
- double fij = xt->mat[j + i * n_cols];
-
- if (proc->statistics & CRS_ST_BTAU)
- btau_cum += fij * pow2 (2. * sqrt (Dr * Dc) * (Cij - Dij)
- + v[3] * (xt->row_tot[i] * Dc
- + xt->col_tot[j] * Dr));
- ctau_cum += fij * pow2 (Cij - Dij);
-
- if (proc->statistics & CRS_ST_GAMMA)
- gamma_cum += fij * pow2 (Q * Cij - P * Dij);
-
- if (proc->statistics & CRS_ST_D)
- {
- d_yx_cum += fij * pow2 (Dr * (Cij - Dij)
- - (P - Q) * (xt->total - xt->row_tot[i]));
- d_xy_cum += fij * pow2 (Dc * (Dij - Cij)
- - (Q - P) * (xt->total - xt->col_tot[j]));
- }
-
- if (++j >= n_cols)
- break;
-
- Cij -= xt->col_tot[j] - cum[j + i * n_cols];
- Dij += xt->col_tot[j - 1] - cum[j - 1 + i * n_cols];
-
- if (i > 0)
- {
- Cij += cum[j - 1 + (i - 1) * n_cols];
- Dij -= cum[j + (i - 1) * n_cols];
- }
- }
- }
-
- if (proc->statistics & CRS_ST_BTAU)
- {
- double btau_var = ((btau_cum
- - (xt->total * pow2 (xt->total * (P - Q) / sqrt (Dr * Dc) * (Dr + Dc))))
- / pow2 (Dr * Dc));
- ase[3] = sqrt (btau_var);
- t[3] = v[3] / (2 * sqrt ((ctau_cum - (P - Q) * (P - Q) / xt->total)
- / (Dr * Dc)));
- }
- if (proc->statistics & CRS_ST_CTAU)
- {
- ase[4] = ((2 * q / ((q - 1) * pow2 (xt->total)))
- * sqrt (ctau_cum - (P - Q) * (P - Q) / xt->total));
- t[4] = v[4] / ase[4];
- }
- if (proc->statistics & CRS_ST_GAMMA)
- {
- ase[5] = ((4. / ((P + Q) * (P + Q))) * sqrt (gamma_cum));
- t[5] = v[5] / (2. / (P + Q)
- * sqrt (ctau_cum - (P - Q) * (P - Q) / xt->total));
- }
- if (proc->statistics & CRS_ST_D)
- {
- somers_d_v[0] = (P - Q) / (.5 * (Dc + Dr));
- somers_d_ase[0] = SYSMIS;
- somers_d_t[0] = (somers_d_v[0]
- / (4 / (Dc + Dr)
- * sqrt (ctau_cum - pow2 (P - Q) / xt->total)));
- somers_d_v[1] = (P - Q) / Dc;
- somers_d_ase[1] = 2. / pow2 (Dc) * sqrt (d_xy_cum);
- somers_d_t[1] = (somers_d_v[1]
- / (2. / Dc
- * sqrt (ctau_cum - pow2 (P - Q) / xt->total)));
- somers_d_v[2] = (P - Q) / Dr;
- somers_d_ase[2] = 2. / pow2 (Dr) * sqrt (d_yx_cum);
- somers_d_t[2] = (somers_d_v[2]
- / (2. / Dr
- * sqrt (ctau_cum - pow2 (P - Q) / xt->total)));
- }
-
- free (cum);
- }
-
- /* Spearman correlation, Pearson's r. */
- if (proc->statistics & CRS_ST_CORR)
- {
- double *R = xmalloc (sizeof *R * n_rows);
- double c = 0;
- double s = 0;
- for (size_t i = 0; i < n_rows; i++)
- {
- R[i] = s + (xt->row_tot[i] + 1.) / 2.;
- double y = xt->row_tot[i] - c;
- double t = s + y;
- c = (t - s) - y;
- s = t;
- }
-
- double *C = xmalloc (sizeof *C * n_cols);
- c = s = 0;
- for (size_t j = 0; j < n_cols; j++)
- {
- C[j] = s + (xt->col_tot[j] + 1.) / 2;
- double y = xt->col_tot[j] - c;
- double t = s + y;
- c = (t - s) - y;
- s = t;
- }
-
- calc_r (xt, R, C, &v[6], &t[6], &ase[6]);
-
- free (R);
- free (C);
-
- calc_r (xt, (double *) xt->vars[ROW_VAR].values,
- (double *) xt->vars[COL_VAR].values,
- &v[7], &t[7], &ase[7]);
- }
-
- /* Cohen's kappa. */
- if (proc->statistics & CRS_ST_KAPPA && xt->ns_rows == xt->ns_cols)
- {
- double sum_fii = 0;
- double sum_rici = 0;
- double sum_fiiri_ci = 0;
- double sum_riciri_ci = 0;
- for (size_t i = 0, j = 0; i < xt->ns_rows; i++, j++)
- {
- while (xt->col_tot[j] == 0.)
- j++;
-
- double prod = xt->row_tot[i] * xt->col_tot[j];
- double sum = xt->row_tot[i] + xt->col_tot[j];
-
- sum_fii += xt->mat[j + i * n_cols];
- sum_rici += prod;
- sum_fiiri_ci += xt->mat[j + i * n_cols] * sum;
- sum_riciri_ci += prod * sum;
- }
-
- double sum_fijri_ci2 = 0;
- for (size_t i = 0; i < xt->ns_rows; i++)
- for (size_t j = 0; j < xt->ns_cols; j++)
- {
- double sum = xt->row_tot[i] + xt->col_tot[j];
- sum_fijri_ci2 += xt->mat[j + i * n_cols] * sum * sum;
- }
-
- v[8] = (xt->total * sum_fii - sum_rici) / (pow2 (xt->total) - sum_rici);
-
- double ase_under_h0 = sqrt ((pow2 (xt->total) * sum_rici
- + sum_rici * sum_rici
- - xt->total * sum_riciri_ci)
- / (xt->total * (pow2 (xt->total) - sum_rici) * (pow2 (xt->total) - sum_rici)));
-
- ase[8] = sqrt (xt->total * (((sum_fii * (xt->total - sum_fii))
- / pow2 (pow2 (xt->total) - sum_rici))
- + ((2. * (xt->total - sum_fii)
- * (2. * sum_fii * sum_rici
- - xt->total * sum_fiiri_ci))
- / pow3 (pow2 (xt->total) - sum_rici))
- + (pow2 (xt->total - sum_fii)
- * (xt->total * sum_fijri_ci2 - 4.
- * sum_rici * sum_rici)
- / pow4 (pow2 (xt->total) - sum_rici))));
-
- t[8] = v[8] / ase_under_h0;
- }
-
- return true;
-}
-
-/* Calculate risk estimate. */
-static bool
-calc_risk (struct crosstabulation *xt,
- double *value, double *upper, double *lower, union value *c,
- double *n_valid)
-{
- size_t n_cols = xt->vars[COL_VAR].n_values;
-
- for (size_t i = 0; i < 3; i++)
- value[i] = upper[i] = lower[i] = SYSMIS;
-
- if (xt->ns_rows != 2 || xt->ns_cols != 2)
- return false;
-
- /* Find populated columns. */
- size_t nz_cols[2];
- size_t n = 0;
- FOR_EACH_POPULATED_COLUMN (c, xt)
- nz_cols[n++] = c;
- assert (n == 2);
-
- /* Find populated rows. */
- size_t nz_rows[2];
- n = 0;
- FOR_EACH_POPULATED_ROW (r, xt)
- nz_rows[n++] = r;
- assert (n == 2);
-
- double f11 = xt->mat[nz_cols[0] + n_cols * nz_rows[0]];
- double f12 = xt->mat[nz_cols[1] + n_cols * nz_rows[0]];
- double f21 = xt->mat[nz_cols[0] + n_cols * nz_rows[1]];
- double f22 = xt->mat[nz_cols[1] + n_cols * nz_rows[1]];
- *n_valid = f11 + f12 + f21 + f22;
-
- c[0] = xt->vars[COL_VAR].values[nz_cols[0]];
- c[1] = xt->vars[COL_VAR].values[nz_cols[1]];
-
- value[0] = (f11 * f22) / (f12 * f21);
- double v = sqrt (1. / f11 + 1. / f12 + 1. / f21 + 1. / f22);
- lower[0] = value[0] * exp (-1.960 * v);
- upper[0] = value[0] * exp (1.960 * v);
-
- value[1] = (f11 * (f21 + f22)) / (f21 * (f11 + f12));
- v = sqrt ((f12 / (f11 * (f11 + f12)))
- + (f22 / (f21 * (f21 + f22))));
- lower[1] = value[1] * exp (-1.960 * v);
- upper[1] = value[1] * exp (1.960 * v);
-
- value[2] = (f12 * (f21 + f22)) / (f22 * (f11 + f12));
- v = sqrt ((f11 / (f12 * (f11 + f12)))
- + (f21 / (f22 * (f21 + f22))));
- lower[2] = value[2] * exp (-1.960 * v);
- upper[2] = value[2] * exp (1.960 * v);
-
- return true;
-}
-
-/* Calculate directional measures. */
-static void
-calc_directional (struct crosstabs_proc *proc, struct crosstabulation *xt,
- double v[N_DIRECTIONAL], double ase[N_DIRECTIONAL],
- double t[N_DIRECTIONAL], double sig[N_DIRECTIONAL])
-{
- size_t n_rows = xt->vars[ROW_VAR].n_values;
- size_t n_cols = xt->vars[COL_VAR].n_values;
- for (size_t i = 0; i < N_DIRECTIONAL; i++)
- v[i] = ase[i] = t[i] = sig[i] = SYSMIS;
-
- /* Lambda. */
- if (proc->statistics & CRS_ST_LAMBDA)
- {
- /* Find maximum for each row and their sum. */
- double *fim = xnmalloc (n_rows, sizeof *fim);
- size_t *fim_index = xnmalloc (n_rows, sizeof *fim_index);
- double sum_fim = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- {
- double max = xt->mat[i * n_cols];
- size_t index = 0;
-
- for (size_t j = 1; j < n_cols; j++)
- if (xt->mat[j + i * n_cols] > max)
- {
- max = xt->mat[j + i * n_cols];
- index = j;
- }
-
- fim[i] = max;
- sum_fim += max;
- fim_index[i] = index;
- }
-
- /* Find maximum for each column. */
- double *fmj = xnmalloc (n_cols, sizeof *fmj);
- size_t *fmj_index = xnmalloc (n_cols, sizeof *fmj_index);
- double sum_fmj = 0.0;
- for (size_t j = 0; j < n_cols; j++)
- {
- double max = xt->mat[j];
- size_t index = 0;
-
- for (size_t i = 1; i < n_rows; i++)
- if (xt->mat[j + i * n_cols] > max)
- {
- max = xt->mat[j + i * n_cols];
- index = i;
- }
-
- fmj[j] = max;
- sum_fmj += max;
- fmj_index[j] = index;
- }
-
- /* Find maximum row total. */
- double rm = xt->row_tot[0];
- size_t rm_index = 0;
- for (size_t i = 1; i < n_rows; i++)
- if (xt->row_tot[i] > rm)
- {
- rm = xt->row_tot[i];
- rm_index = i;
- }
-
- /* Find maximum column total. */
- double cm = xt->col_tot[0];
- size_t cm_index = 0;
- for (size_t j = 1; j < n_cols; j++)
- if (xt->col_tot[j] > cm)
- {
- cm = xt->col_tot[j];
- cm_index = j;
- }
-
- v[0] = (sum_fim + sum_fmj - cm - rm) / (2. * xt->total - rm - cm);
- v[1] = (sum_fmj - rm) / (xt->total - rm);
- v[2] = (sum_fim - cm) / (xt->total - cm);
-
- /* ASE1 for Y given XT. */
- {
- double accum = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- if (cm_index == fim_index[i])
- accum += fim[i];
- ase[2] = sqrt ((xt->total - sum_fim) * (sum_fim + cm - 2. * accum)
- / pow3 (xt->total - cm));
- }
-
- /* ASE0 for Y given XT. */
- {
- double accum = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- if (cm_index != fim_index[i])
- accum += (xt->mat[i * n_cols + fim_index[i]]
- + xt->mat[i * n_cols + cm_index]);
- t[2] = v[2] / (sqrt (accum - pow2 (sum_fim - cm) / xt->total) / (xt->total - cm));
- }
-
- /* ASE1 for XT given Y. */
- {
- double accum = 0.0;
- for (size_t j = 0; j < n_cols; j++)
- if (rm_index == fmj_index[j])
- accum += fmj[j];
- ase[1] = sqrt ((xt->total - sum_fmj) * (sum_fmj + rm - 2. * accum)
- / pow3 (xt->total - rm));
- }
-
- /* ASE0 for XT given Y. */
- {
- double accum = 0.0;
- for (size_t j = 0; j < n_cols; j++)
- if (rm_index != fmj_index[j])
- accum += (xt->mat[j + n_cols * fmj_index[j]]
- + xt->mat[j + n_cols * rm_index]);
- t[1] = v[1] / (sqrt (accum - pow2 (sum_fmj - rm) / xt->total) / (xt->total - rm));
- }
-
- /* Symmetric ASE0 and ASE1. */
- {
- double accum0 = 0.0;
- double accum1 = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- for (size_t j = 0; j < n_cols; j++)
- {
- int temp0 = (fmj_index[j] == i) + (fim_index[i] == j);
- int temp1 = (i == rm_index) + (j == cm_index);
- accum0 += xt->mat[j + i * n_cols] * pow2 (temp0 - temp1);
- accum1 += (xt->mat[j + i * n_cols]
- * pow2 (temp0 + (v[0] - 1.) * temp1));
- }
- ase[0] = sqrt (accum1 - 4. * xt->total * v[0] * v[0]) / (2. * xt->total - rm - cm);
- t[0] = v[0] / (sqrt (accum0 - pow2 (sum_fim + sum_fmj - cm - rm) / xt->total)
- / (2. * xt->total - rm - cm));
- }
-
- for (size_t i = 0; i < 3; i++)
- sig[i] = 2 * gsl_cdf_ugaussian_Q (t[i]);
-
- free (fim);
- free (fim_index);
- free (fmj);
- free (fmj_index);
-
- /* Tau. */
- double sum_fij2_ri = 0.0;
- double sum_fij2_ci = 0.0;
- FOR_EACH_POPULATED_ROW (i, xt)
- FOR_EACH_POPULATED_COLUMN (j, xt)
- {
- double temp = pow2 (xt->mat[j + i * n_cols]);
- sum_fij2_ri += temp / xt->row_tot[i];
- sum_fij2_ci += temp / xt->col_tot[j];
- }
-
- double sum_ri2 = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- sum_ri2 += pow2 (xt->row_tot[i]);
-
- double sum_cj2 = 0.0;
- for (size_t j = 0; j < n_cols; j++)
- sum_cj2 += pow2 (xt->col_tot[j]);
-
- v[3] = (xt->total * sum_fij2_ci - sum_ri2) / (pow2 (xt->total) - sum_ri2);
- v[4] = (xt->total * sum_fij2_ri - sum_cj2) / (pow2 (xt->total) - sum_cj2);
- }
-
- if (proc->statistics & CRS_ST_UC)
- {
- double UX = 0.0;
- FOR_EACH_POPULATED_ROW (i, xt)
- UX -= xt->row_tot[i] / xt->total * log (xt->row_tot[i] / xt->total);
-
- double UY = 0.0;
- FOR_EACH_POPULATED_COLUMN (j, xt)
- UY -= xt->col_tot[j] / xt->total * log (xt->col_tot[j] / xt->total);
-
- double UXY = 0.0;
- double P = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- for (size_t j = 0; j < n_cols; j++)
- {
- double entry = xt->mat[j + i * n_cols];
-
- if (entry <= 0.)
- continue;
-
- P += entry * pow2 (log (xt->col_tot[j] * xt->row_tot[i] / (xt->total * entry)));
- UXY -= entry / xt->total * log (entry / xt->total);
- }
-
- double ase1_yx = 0.0;
- double ase1_xy = 0.0;
- double ase1_sym = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- for (size_t j = 0; j < n_cols; j++)
- {
- double entry = xt->mat[j + i * n_cols];
-
- if (entry <= 0.)
- continue;
-
- ase1_yx += entry * pow2 (UY * log (entry / xt->row_tot[i])
- + (UX - UXY) * log (xt->col_tot[j] / xt->total));
- ase1_xy += entry * pow2 (UX * log (entry / xt->col_tot[j])
- + (UY - UXY) * log (xt->row_tot[i] / xt->total));
- ase1_sym += entry * pow2 ((UXY
- * log (xt->row_tot[i] * xt->col_tot[j] / pow2 (xt->total)))
- - (UX + UY) * log (entry / xt->total));
- }
-
- v[5] = 2. * ((UX + UY - UXY) / (UX + UY));
- ase[5] = (2. / (xt->total * pow2 (UX + UY))) * sqrt (ase1_sym);
- t[5] = SYSMIS;
-
- v[6] = (UX + UY - UXY) / UX;
- ase[6] = sqrt (ase1_xy) / (xt->total * UX * UX);
- t[6] = v[6] / (sqrt (P - xt->total * pow2 (UX + UY - UXY)) / (xt->total * UX));
-
- v[7] = (UX + UY - UXY) / UY;
- ase[7] = sqrt (ase1_yx) / (xt->total * UY * UY);
- t[7] = v[7] / (sqrt (P - xt->total * pow2 (UX + UY - UXY)) / (xt->total * UY));
- }
-
- /* Somers' D. */
- if (proc->statistics & CRS_ST_D)
- {
- double v_dummy[N_SYMMETRIC];
- double ase_dummy[N_SYMMETRIC];
- double t_dummy[N_SYMMETRIC];
- double somers_d_v[3];
- double somers_d_ase[3];
- double somers_d_t[3];
-
- if (calc_symmetric (proc, xt, v_dummy, ase_dummy, t_dummy,
- somers_d_v, somers_d_ase, somers_d_t))
- {
- for (size_t i = 0; i < 3; i++)
- {
- v[8 + i] = somers_d_v[i];
- ase[8 + i] = somers_d_ase[i];
- t[8 + i] = somers_d_t[i];
- sig[8 + i] = 2 * gsl_cdf_ugaussian_Q (fabs (somers_d_t[i]));
- }
- }
- }
-
- /* Eta. */
- if (proc->statistics & CRS_ST_ETA)
- {
- /* X dependent. */
- double sum_Xr = 0.0;
- double sum_X2r = 0.0;
- for (size_t i = 0; i < n_rows; i++)
- {
- sum_Xr += xt->vars[ROW_VAR].values[i].f * xt->row_tot[i];
- sum_X2r += pow2 (xt->vars[ROW_VAR].values[i].f) * xt->row_tot[i];
- }
- double SX = sum_X2r - pow2 (sum_Xr) / xt->total;
-
- double SXW = 0.0;
- FOR_EACH_POPULATED_COLUMN (j, xt)
- {
- double cum = 0.0;
-
- for (size_t i = 0; i < n_rows; i++)
- {
- SXW += (pow2 (xt->vars[ROW_VAR].values[i].f)
- * xt->mat[j + i * n_cols]);
- cum += (xt->vars[ROW_VAR].values[i].f
- * xt->mat[j + i * n_cols]);
- }
-
- SXW -= cum * cum / xt->col_tot[j];
- }
- v[11] = sqrt (1. - SXW / SX);
-
- /* Y dependent. */
- double sum_Yc = 0.0;
- double sum_Y2c = 0.0;
- for (size_t i = 0; i < n_cols; i++)
- {
- sum_Yc += xt->vars[COL_VAR].values[i].f * xt->col_tot[i];
- sum_Y2c += pow2 (xt->vars[COL_VAR].values[i].f) * xt->col_tot[i];
- }
- double SY = sum_Y2c - pow2 (sum_Yc) / xt->total;
-
- double SYW = 0.0;
- FOR_EACH_POPULATED_ROW (i, xt)
- {
- double cum = 0.0;
- for (size_t j = 0; j < n_cols; j++)
- {
- SYW += (pow2 (xt->vars[COL_VAR].values[j].f)
- * xt->mat[j + i * n_cols]);
- cum += (xt->vars[COL_VAR].values[j].f
- * xt->mat[j + i * n_cols]);
- }
-
- SYW -= cum * cum / xt->row_tot[i];
- }
- v[12] = sqrt (1. - SYW / SY);
- }
-}
projects / pspp / blobdiff