/* PSPP - a program for statistical analysis.
- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2010, 2011, 2012 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
#include "language/lexer/lexer.h"
#include "language/lexer/value-parser.h"
#include "language/lexer/variable-parser.h"
+#include "libpspp/assertion.h"
#include "libpspp/ll.h"
#include "libpspp/message.h"
#include "libpspp/misc.h"
}
glm.ss_type = lex_integer (lexer);
- if (1 != glm.ss_type && 2 != glm.ss_type )
+ if (1 > glm.ss_type || 3 < glm.ss_type )
{
- msg (ME, _("Only types 1 & 2 sum of squares are currently implemented"));
+ msg (ME, _("Only types 1, 2 & 3 sums of squares are currently implemented"));
goto error;
}
free (glm.factor_vars);
for (i = 0 ; i < glm.n_interactions; ++i)
interaction_destroy (glm.interactions[i]);
+
free (glm.interactions);
free (glm.dep_vars);
return CMD_FAILURE;
}
-static void get_ssq (struct covariance *, gsl_vector *,
- const struct glm_spec *);
-
static inline bool
not_dropped (size_t j, const bool *ff)
{
}
}
}
-
+
+
+/*
+ Type 1 sums of squares.
+ Populate SSQ with the Type 1 sums of squares according to COV
+ */
static void
-get_ssq (struct covariance *cov, gsl_vector *ssq, const struct glm_spec *cmd)
+ssq_type1 (struct covariance *cov, gsl_vector *ssq, const struct glm_spec *cmd)
{
- gsl_matrix *cm = covariance_calculate_unnormalized (cov);
+ const gsl_matrix *cm = covariance_calculate_unnormalized (cov);
+ size_t i;
+ size_t k;
+ bool *model_dropped = xcalloc (covariance_dim (cov), sizeof (*model_dropped));
+ bool *submodel_dropped = xcalloc (covariance_dim (cov), sizeof (*submodel_dropped));
+ const struct categoricals *cats = covariance_get_categoricals (cov);
+
+ size_t n_dropped_model = 0;
+ size_t n_dropped_submodel = 0;
+
+ for (i = cmd->n_dep_vars; i < covariance_dim (cov); i++)
+ {
+ n_dropped_model++;
+ n_dropped_submodel++;
+ model_dropped[i] = true;
+ submodel_dropped[i] = true;
+ }
+
+ for (k = 0; k < cmd->n_interactions; k++)
+ {
+ gsl_matrix *model_cov = NULL;
+ gsl_matrix *submodel_cov = NULL;
+
+ n_dropped_submodel = n_dropped_model;
+ for (i = cmd->n_dep_vars; i < covariance_dim (cov); i++)
+ {
+ submodel_dropped[i] = model_dropped[i];
+ }
+
+ for (i = cmd->n_dep_vars; i < covariance_dim (cov); i++)
+ {
+ const struct interaction * x =
+ categoricals_get_interaction_by_subscript (cats, i - cmd->n_dep_vars);
+
+ if ( x == cmd->interactions [k])
+ {
+ model_dropped[i] = false;
+ n_dropped_model--;
+ }
+ }
+
+ model_cov = gsl_matrix_alloc (cm->size1 - n_dropped_model, cm->size2 - n_dropped_model);
+ submodel_cov = gsl_matrix_alloc (cm->size1 - n_dropped_submodel, cm->size2 - n_dropped_submodel);
+
+ fill_submatrix (cm, model_cov, model_dropped);
+ fill_submatrix (cm, submodel_cov, submodel_dropped);
+
+ reg_sweep (model_cov, 0);
+ reg_sweep (submodel_cov, 0);
+
+ gsl_vector_set (ssq, k + 1,
+ gsl_matrix_get (submodel_cov, 0, 0) - gsl_matrix_get (model_cov, 0, 0)
+ );
+
+ gsl_matrix_free (model_cov);
+ gsl_matrix_free (submodel_cov);
+ }
+
+ free (model_dropped);
+ free (submodel_dropped);
+}
+
+/*
+ Type 2 sums of squares.
+ Populate SSQ with the Type 2 sums of squares according to COV
+ */
+static void
+ssq_type2 (struct covariance *cov, gsl_vector *ssq, const struct glm_spec *cmd)
+{
+ const gsl_matrix *cm = covariance_calculate_unnormalized (cov);
size_t i;
size_t k;
bool *model_dropped = xcalloc (covariance_dim (cov), sizeof (*model_dropped));
free (model_dropped);
free (submodel_dropped);
- gsl_matrix_free (cm);
}
+/*
+ Type 3 sums of squares.
+ Populate SSQ with the Type 2 sums of squares according to COV
+ */
+static void
+ssq_type3 (struct covariance *cov, gsl_vector *ssq, const struct glm_spec *cmd)
+{
+ const gsl_matrix *cm = covariance_calculate_unnormalized (cov);
+ size_t i;
+ size_t k;
+ bool *model_dropped = xcalloc (covariance_dim (cov), sizeof (*model_dropped));
+ bool *submodel_dropped = xcalloc (covariance_dim (cov), sizeof (*submodel_dropped));
+ const struct categoricals *cats = covariance_get_categoricals (cov);
+
+ double ss0;
+ gsl_matrix *submodel_cov = gsl_matrix_alloc (cm->size1, cm->size2);
+ fill_submatrix (cm, submodel_cov, submodel_dropped);
+ reg_sweep (submodel_cov, 0);
+ ss0 = gsl_matrix_get (submodel_cov, 0, 0);
+ gsl_matrix_free (submodel_cov);
+ free (submodel_dropped);
+
+ for (k = 0; k < cmd->n_interactions; k++)
+ {
+ gsl_matrix *model_cov = NULL;
+ size_t n_dropped_model = 0;
+
+ for (i = cmd->n_dep_vars; i < covariance_dim (cov); i++)
+ {
+ const struct interaction * x =
+ categoricals_get_interaction_by_subscript (cats, i - cmd->n_dep_vars);
+
+ model_dropped[i] = false;
+
+ if ( cmd->interactions [k] == x)
+ {
+ assert (n_dropped_model < covariance_dim (cov));
+ n_dropped_model++;
+ model_dropped[i] = true;
+ }
+ }
+
+ model_cov = gsl_matrix_alloc (cm->size1 - n_dropped_model, cm->size2 - n_dropped_model);
+
+ fill_submatrix (cm, model_cov, model_dropped);
+
+ reg_sweep (model_cov, 0);
+
+ gsl_vector_set (ssq, k + 1,
+ gsl_matrix_get (model_cov, 0, 0) - ss0);
+
+ gsl_matrix_free (model_cov);
+ }
+ free (model_dropped);
+}
+
+
+
//static void dump_matrix (const gsl_matrix *m);
static void
struct covariance *cov;
ws.cats = categoricals_create (cmd->interactions, cmd->n_interactions,
- cmd->wv, cmd->exclude,
- NULL, NULL, NULL, NULL);
+ cmd->wv, cmd->exclude, MV_ANY);
cov = covariance_2pass_create (cmd->n_dep_vars, cmd->dep_vars,
ws.cats, cmd->wv, cmd->exclude);
}
{
- gsl_matrix *cm = covariance_calculate_unnormalized (cov);
+ const gsl_matrix *ucm = covariance_calculate_unnormalized (cov);
+ gsl_matrix *cm = gsl_matrix_alloc (ucm->size1, ucm->size2);
+ gsl_matrix_memcpy (cm, ucm);
// dump_matrix (cm);
*/
ws.ssq = gsl_vector_alloc (cm->size1);
gsl_vector_set (ws.ssq, 0, gsl_matrix_get (cm, 0, 0));
- get_ssq (cov, ws.ssq, cmd);
+ switch (cmd->ss_type)
+ {
+ case 1:
+ ssq_type1 (cov, ws.ssq, cmd);
+ break;
+ case 2:
+ ssq_type2 (cov, ws.ssq, cmd);
+ break;
+ case 3:
+ ssq_type3 (cov, ws.ssq, cmd);
+ break;
+ default:
+ NOT_REACHED ();
+ break;
+ }
// dump_matrix (cm);
-
gsl_matrix_free (cm);
}
const struct fmt_spec *wfmt =
cmd->wv ? var_get_print_format (cmd->wv) : &F_8_0;
+ double intercept_ssq;
+ double ssq_effects;
double n_total, mean;
- double df_corr = 0.0;
+ double df_corr = 1.0;
double mse = 0;
int f;
struct tab_table *t;
const int nc = 6;
- int nr = heading_rows + 4 + cmd->n_interactions;
+ int nr = heading_rows + 3 + cmd->n_interactions;
if (cmd->intercept)
- nr++;
+ nr += 2;
msg (MW, "GLM is experimental. Do not rely on these results.");
t = tab_create (nc, nr);
+ tab_set_format (t, RC_WEIGHT, wfmt);
tab_title (t, _("Tests of Between-Subjects Effects"));
tab_headers (t, heading_columns, 0, heading_rows, 0);
moments_calculate (ws->totals, &n_total, &mean, NULL, NULL, NULL);
- if (cmd->intercept)
- df_corr += 1.0;
-
df_corr += categoricals_df_total (ws->cats);
- mse = gsl_vector_get (ws->ssq, 0) / (n_total - df_corr);
-
r = heading_rows;
- tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Corrected Model"));
+ if (cmd->intercept)
+ tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Corrected Model"));
+ else
+ tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Model"));
r++;
+ mse = gsl_vector_get (ws->ssq, 0) / (n_total - df_corr);
+
+ intercept_ssq = pow2 (mean * n_total) / n_total;
+
+ ssq_effects = 0.0;
if (cmd->intercept)
{
- const double intercept = pow2 (mean * n_total) / n_total;
const double df = 1.0;
- const double F = intercept / df / mse;
+ const double F = intercept_ssq / df / mse;
tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Intercept"));
- tab_double (t, 1, r, 0, intercept, NULL);
- tab_double (t, 2, r, 0, 1.00, wfmt);
- tab_double (t, 3, r, 0, intercept / df, NULL);
- tab_double (t, 4, r, 0, F, NULL);
+ tab_double (t, 1, r, 0, intercept_ssq, NULL, RC_OTHER);
+ tab_double (t, 2, r, 0, 1.00, NULL, RC_WEIGHT);
+ tab_double (t, 3, r, 0, intercept_ssq / df, NULL, RC_OTHER);
+ tab_double (t, 4, r, 0, F, NULL, RC_OTHER);
tab_double (t, 5, r, 0, gsl_cdf_fdist_Q (F, df, n_total - df_corr),
- NULL);
+ NULL, RC_PVALUE);
r++;
}
for (f = 0; f < cmd->n_interactions; ++f)
{
struct string str = DS_EMPTY_INITIALIZER;
- const double df = categoricals_df (ws->cats, f);
- const double ssq = gsl_vector_get (ws->ssq, f + 1);
- const double F = ssq / df / mse;
+ double df = categoricals_df (ws->cats, f);
+
+ double ssq = gsl_vector_get (ws->ssq, f + 1);
+ double F;
+
+ ssq_effects += ssq;
+
+ if (! cmd->intercept)
+ {
+ df++;
+ ssq += intercept_ssq;
+ }
+
+ F = ssq / df / mse;
interaction_to_string (cmd->interactions[f], &str);
tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, ds_cstr (&str));
ds_destroy (&str);
- tab_double (t, 1, r, 0, ssq, NULL);
- tab_double (t, 2, r, 0, df, wfmt);
- tab_double (t, 3, r, 0, ssq / df, NULL);
- tab_double (t, 4, r, 0, F, NULL);
+ tab_double (t, 1, r, 0, ssq, NULL, RC_OTHER);
+ tab_double (t, 2, r, 0, df, NULL, RC_WEIGHT);
+ tab_double (t, 3, r, 0, ssq / df, NULL, RC_OTHER);
+ tab_double (t, 4, r, 0, F, NULL, RC_OTHER);
tab_double (t, 5, r, 0, gsl_cdf_fdist_Q (F, df, n_total - df_corr),
- NULL);
+ NULL, RC_PVALUE);
r++;
}
{
- /* Corrected Model */
- const double df = df_corr - 1.0;
- const double ssq = ws->total_ssq - gsl_vector_get (ws->ssq, 0);
- const double F = ssq / df / mse;
- tab_double (t, 1, heading_rows, 0, ssq, NULL);
- tab_double (t, 2, heading_rows, 0, df, wfmt);
- tab_double (t, 3, heading_rows, 0, ssq / df, NULL);
- tab_double (t, 4, heading_rows, 0, F, NULL);
+ /* Model / Corrected Model */
+ double df = df_corr;
+ double ssq = ws->total_ssq - gsl_vector_get (ws->ssq, 0);
+ double F;
+
+ if ( cmd->intercept )
+ df --;
+ else
+ ssq += intercept_ssq;
+
+ F = ssq / df / mse;
+ tab_double (t, 1, heading_rows, 0, ssq, NULL, RC_OTHER);
+ tab_double (t, 2, heading_rows, 0, df, NULL, RC_WEIGHT);
+ tab_double (t, 3, heading_rows, 0, ssq / df, NULL, RC_OTHER);
+ tab_double (t, 4, heading_rows, 0, F, NULL, RC_OTHER);
tab_double (t, 5, heading_rows, 0,
- gsl_cdf_fdist_Q (F, df, n_total - df_corr), NULL);
+ gsl_cdf_fdist_Q (F, df, n_total - df_corr), NULL, RC_PVALUE);
}
{
const double ssq = gsl_vector_get (ws->ssq, 0);
const double mse = ssq / df;
tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Error"));
- tab_double (t, 1, r, 0, ssq, NULL);
- tab_double (t, 2, r, 0, df, wfmt);
- tab_double (t, 3, r++, 0, mse, NULL);
+ tab_double (t, 1, r, 0, ssq, NULL, RC_OTHER);
+ tab_double (t, 2, r, 0, df, NULL, RC_WEIGHT);
+ tab_double (t, 3, r++, 0, mse, NULL, RC_OTHER);
+ }
+
+ {
+ tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Total"));
+ tab_double (t, 1, r, 0, ws->total_ssq + intercept_ssq, NULL, RC_OTHER);
+ tab_double (t, 2, r, 0, n_total, NULL, RC_WEIGHT);
+
+ r++;
}
if (cmd->intercept)
{
- const double intercept = pow2 (mean * n_total) / n_total;
- const double ssq = intercept + ws->total_ssq;
-
- tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Total"));
- tab_double (t, 1, r, 0, ssq, NULL);
- tab_double (t, 2, r, 0, n_total, wfmt);
-
- r++;
+ tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Corrected Total"));
+ tab_double (t, 1, r, 0, ws->total_ssq, NULL, RC_OTHER);
+ tab_double (t, 2, r, 0, n_total - 1.0, NULL, RC_WEIGHT);
}
- tab_text (t, 0, r, TAB_LEFT | TAT_TITLE, _("Corrected Total"));
-
-
- tab_double (t, 1, r, 0, ws->total_ssq, NULL);
- tab_double (t, 2, r, 0, n_total - 1.0, wfmt);
-
tab_submit (t);
}
\f
-
-/* Match a variable.
- If the match succeeds, the variable will be placed in VAR.
- Returns true if successful */
-static bool
-lex_match_variable (struct lexer *lexer, const struct glm_spec *glm, const struct variable **var)
-{
- if (lex_token (lexer) != T_ID)
- return false;
-
- *var = parse_variable_const (lexer, glm->dict);
-
- if ( *var == NULL)
- return false;
- return true;
-}
-
-/* An interaction is a variable followed by {*, BY} followed by an interaction */
-static bool
-parse_design_interaction (struct lexer *lexer, struct glm_spec *glm, struct interaction **iact)
-{
- const struct variable *v = NULL;
- assert (iact);
-
- switch (lex_next_token (lexer, 1))
- {
- case T_ENDCMD:
- case T_SLASH:
- case T_COMMA:
- case T_ID:
- case T_BY:
- case T_ASTERISK:
- break;
- default:
- return false;
- break;
- }
-
- if (! lex_match_variable (lexer, glm, &v))
- {
- interaction_destroy (*iact);
- *iact = NULL;
- return false;
- }
-
- assert (v);
-
- if ( *iact == NULL)
- *iact = interaction_create (v);
- else
- interaction_add_variable (*iact, v);
-
- if ( lex_match (lexer, T_ASTERISK) || lex_match (lexer, T_BY))
- {
- return parse_design_interaction (lexer, glm, iact);
- }
-
- return true;
-}
-
static bool
parse_nested_variable (struct lexer *lexer, struct glm_spec *glm)
{
const struct variable *v = NULL;
- if ( ! lex_match_variable (lexer, glm, &v))
+ if ( ! lex_match_variable (lexer, glm->dict, &v))
return false;
if (lex_match (lexer, T_LPAREN))
parse_design_term (struct lexer *lexer, struct glm_spec *glm)
{
struct interaction *iact = NULL;
- if (parse_design_interaction (lexer, glm, &iact))
+ if (parse_design_interaction (lexer, glm->dict, &iact))
{
/* Interaction parsing successful. Add to list of interactions */
glm->interactions = xrealloc (glm->interactions, sizeof *glm->interactions * ++glm->n_interactions);
projects / pspp / blobdiff