{
/* True if the covariances are centerered. (ie Real covariances) */
bool centered;
-
+
/* The variables for which the covariance matrix is to be calculated. */
size_t n_vars;
const struct variable *const *vars;
be identical. If missing values are involved, then element (i,j)
is the moment of the i th variable, when paired with the j th variable.
*/
-const gsl_matrix *
+gsl_matrix *
covariance_moments (const struct covariance *cov, int m)
{
return cov->moments[m];
bool centered)
{
size_t i;
- struct covariance *cov = xzalloc (sizeof *cov);
+ struct covariance *cov = XZALLOC (struct covariance);
cov->centered = centered;
cov->passes = 1;
cov->exclude = exclude;
- cov->n_cm = (n_vars * (n_vars - 1) ) / 2;
+ cov->n_cm = (n_vars * (n_vars - 1)) / 2;
cov->cm = xcalloc (cov->n_cm, sizeof *cov->cm);
assert (i >= 0);
assert (j < cov->dim);
- if ( i == 0)
+ if (i == 0)
return -1;
if (j >= cov->dim - 1)
return -1;
- if ( i <= j)
+ if (i <= j)
return -1 ;
as = nj * (nj + 1) ;
const union value *val = case_data (c, var);
- return var_is_value_missing (var, val, cov->exclude);
+ return (var_is_value_missing (var, val) & cov->exclude) != 0;
}
static double
get_val (const struct covariance *cov, int i, const struct ccase *c)
{
- if ( i < cov->n_vars)
+ if (i < cov->n_vars)
{
const struct variable *var = cov->vars[i];
covariance_accumulate_pass1 (struct covariance *cov, const struct ccase *c)
{
size_t i, j, m;
- const double weight = cov->wv ? case_data (c, cov->wv)->f : 1.0;
+ const double weight = cov->wv ? case_num (c, cov->wv) : 1.0;
assert (cov->passes == 2);
if (!cov->pass_one_first_case_seen)
{
double v1 = get_val (cov, i, c);
- if ( is_missing (cov, i, c))
+ if (is_missing (cov, i, c))
continue;
for (j = 0 ; j < cov->dim; ++j)
{
double pwr = 1.0;
- if ( is_missing (cov, j, c))
+ if (is_missing (cov, j, c))
continue;
for (m = 0 ; m <= MOMENT_MEAN; ++m)
covariance_accumulate_pass2 (struct covariance *cov, const struct ccase *c)
{
size_t i, j;
- const double weight = cov->wv ? case_data (c, cov->wv)->f : 1.0;
+ const double weight = cov->wv ? case_num (c, cov->wv) : 1.0;
assert (cov->passes == 2);
assert (cov->state >= 1);
if (cov->categoricals)
cov->dim += categoricals_df_total (cov->categoricals);
- cov->n_cm = (cov->dim * (cov->dim - 1) ) / 2;
+ cov->n_cm = (cov->dim * (cov->dim - 1)) / 2;
cov->cm = xcalloc (cov->n_cm, sizeof *cov->cm);
/* Grow the moment matrices so that they're large enough to accommodate the
{
double v1 = get_val (cov, i, c);
- if ( is_missing (cov, i, c))
+ if (is_missing (cov, i, c))
continue;
for (j = 0 ; j < cov->dim; ++j)
const double s = pow2 (v1 - gsl_matrix_get (cov->moments[MOMENT_MEAN], i, j)) * weight;
- if ( is_missing (cov, j, c))
+ if (is_missing (cov, j, c))
continue;
{
covariance_accumulate (struct covariance *cov, const struct ccase *c)
{
size_t i, j, m;
- const double weight = cov->wv ? case_data (c, cov->wv)->f : 1.0;
+ const double weight = cov->wv ? case_num (c, cov->wv) : 1.0;
assert (cov->passes == 1);
- if ( !cov->pass_one_first_case_seen)
+ if (!cov->pass_one_first_case_seen)
{
- assert ( cov->state == 0);
+ assert (cov->state == 0);
cov->state = 1;
}
{
const union value *val1 = case_data (c, cov->vars[i]);
- if ( is_missing (cov, i, c))
+ if (is_missing (cov, i, c))
continue;
for (j = 0 ; j < cov->dim; ++j)
int idx;
const union value *val2 = case_data (c, cov->vars[j]);
- if ( is_missing (cov, j, c))
+ if (is_missing (cov, j, c))
continue;
idx = cm_idx (cov, i, j);
gsl_matrix *m = gsl_matrix_calloc (cov->dim, cov->dim);
/* Copy the non-diagonal elements from cov->cm */
- for ( j = 0 ; j < cov->dim - 1; ++j)
+ for (j = 0 ; j < cov->dim - 1; ++j)
{
for (i = j+1 ; i < cov->dim; ++i)
{
*x /= gsl_matrix_get (cov->moments[MOMENT_NONE], i, j);
idx = cm_idx (cov, i, j);
- if ( idx >= 0)
+ if (idx >= 0)
{
x = &cov->cm [idx];
*x /= gsl_matrix_get (cov->moments[MOMENT_NONE], i, j);
for (m = 0; m < n_MOMENTS; ++m)
{
/* Divide the moments by the number of samples */
- if ( m > 0)
+ if (m > 0)
{
for (i = 0 ; i < cov->dim; ++i)
{
double *x = gsl_matrix_ptr (cov->moments[m], i, j);
*x /= gsl_matrix_get (cov->moments[0], i, j);
- if ( m == MOMENT_VARIANCE)
+ if (m == MOMENT_VARIANCE)
*x -= pow2 (gsl_matrix_get (cov->moments[1], i, j));
}
}
if (cov->centered)
{
/* Centre the moments */
- for ( j = 0 ; j < cov->dim - 1; ++j)
+ for (j = 0 ; j < cov->dim - 1; ++j)
{
for (i = j + 1 ; i < cov->dim; ++i)
{
gsl_matrix *
covariance_calculate (struct covariance *cov)
{
- if ( cov->state <= 0 )
+ if (cov->state <= 0)
return NULL;
switch (cov->passes)
}
}
- for ( j = 0 ; j < cov->dim - 1; ++j)
+ for (j = 0 ; j < cov->dim - 1; ++j)
{
for (i = j + 1 ; i < cov->dim; ++i)
{
}
}
}
-
+
return cm_to_gsl (cov);
}
const gsl_matrix *
covariance_calculate_unnormalized (struct covariance *cov)
{
- if ( cov->state <= 0 )
+ if (cov->state <= 0)
return NULL;
if (cov->unnormalised != NULL)
*/
#include "libpspp/str.h"
-#include "output/tab.h"
+#include "output/pivot-table.h"
#include "data/format.h"
/* Create a table which can be populated with the encodings for
the covariance matrix COV */
-struct tab_table *
-covariance_dump_enc_header (const struct covariance *cov, int length)
+struct pivot_table *
+covariance_dump_enc_header (const struct covariance *cov)
{
- struct tab_table *t = tab_create (cov->dim, length);
- int n;
- int i;
-
- tab_title (t, "Covariance Encoding");
-
- tab_box (t,
- TAL_2, TAL_2, 0, 0,
- 0, 0, tab_nc (t) - 1, tab_nr (t) - 1);
-
- tab_hline (t, TAL_2, 0, tab_nc (t) - 1, 1);
-
-
- for (i = 0 ; i < cov->n_vars; ++i)
- {
- tab_text (t, i, 0, TAT_TITLE, var_get_name (cov->vars[i]));
- tab_vline (t, TAL_1, i + 1, 0, tab_nr (t) - 1);
- }
-
- n = 0;
- while (i < cov->dim)
+ struct pivot_table *table = pivot_table_create ("Covariance Encoding");
+
+ struct pivot_dimension *factors = pivot_dimension_create (
+ table, PIVOT_AXIS_COLUMN, "Factor");
+ for (size_t i = 0 ; i < cov->n_vars; ++i)
+ pivot_category_create_leaf (factors->root,
+ pivot_value_new_variable (cov->vars[i]));
+ for (size_t i = 0, n = 0; i < cov->dim - cov->n_vars; n++)
{
- struct string str;
- int idx = i - cov->n_vars;
const struct interaction *iact =
- categoricals_get_interaction_by_subscript (cov->categoricals, idx);
- int df;
+ categoricals_get_interaction_by_subscript (cov->categoricals, i);
- ds_init_empty (&str);
+ struct string str = DS_EMPTY_INITIALIZER;
interaction_to_string (iact, &str);
+ struct pivot_category *group = pivot_category_create_group__ (
+ factors->root,
+ pivot_value_new_user_text_nocopy (ds_steal_cstr (&str)));
- df = categoricals_df (cov->categoricals, n);
-
- tab_joint_text (t,
- i, 0,
- i + df - 1, 0,
- TAT_TITLE, ds_cstr (&str));
-
- if (i + df < tab_nr (t) - 1)
- tab_vline (t, TAL_1, i + df, 0, tab_nr (t) - 1);
+ int df = categoricals_df (cov->categoricals, n);
+ for (int j = 0; j < df; j++)
+ pivot_category_create_leaf_rc (group, pivot_value_new_integer (j),
+ PIVOT_RC_INTEGER);
i += df;
- n++;
- ds_destroy (&str);
}
- return t;
+ struct pivot_dimension *matrix = pivot_dimension_create (
+ table, PIVOT_AXIS_ROW, "Matrix", "Matrix");
+ matrix->hide_all_labels = true;
+
+ return table;
}
*/
void
covariance_dump_enc (const struct covariance *cov, const struct ccase *c,
- struct tab_table *t)
+ struct pivot_table *table)
{
- static int row = 0;
- int i;
- ++row;
- for (i = 0 ; i < cov->dim; ++i)
- {
- double v = get_val (cov, i, c);
- tab_double (t, i, row, 0, v, i < cov->n_vars ? NULL : &F_8_0, RC_OTHER);
- }
+ int row = pivot_category_create_leaf (
+ table->dimensions[1]->root,
+ pivot_value_new_integer (table->dimensions[1]->n_leaves));
+
+ for (int i = 0 ; i < cov->dim; ++i)
+ pivot_table_put2 (
+ table, i, row, pivot_value_new_number (get_val (cov, i, c)));
}