#include <libpspp/message.h>
#include <data/variable.h>
#include <data/category.h>
+#include <data/value.h>
#include <gsl/gsl_machine.h>
#include <gsl/gsl_vector.h>
#define DM_COLUMN_NOT_FOUND -1
#define DM_INDEX_NOT_FOUND -3
-/*
- Which element of a vector is equal to the value x?
- */
-static size_t
-cat_which_element_eq (const gsl_vector * vec, double x)
-{
- size_t i;
-
- for (i = 0; i < vec->size; i++)
- {
- if (fabs (gsl_vector_get (vec, i) - x) < GSL_DBL_EPSILON)
- {
- return i;
- }
- }
- return CAT_VALUE_NOT_FOUND;
-}
-static int
-cat_is_zero_vector (const gsl_vector * vec)
-{
- size_t i;
-
- for (i = 0; i < vec->size; i++)
- {
- if (gsl_vector_get (vec, i) != 0.0)
- {
- return 0;
- }
- }
- return 1;
-}
-
-/*
- Return the value of v corresponding to the vector vec.
- */
-union value *
-cat_vector_to_value (const gsl_vector * vec, struct variable *v)
-{
- size_t i;
-
- i = cat_which_element_eq (vec, 1.0);
- if (i != CAT_VALUE_NOT_FOUND)
- {
- return cat_subscript_to_value (i + 1, v);
- }
- if (cat_is_zero_vector (vec))
- {
- return cat_subscript_to_value (0, v);
- }
- return NULL;
-}
struct design_matrix *
design_matrix_create (int n_variables,
}
else if (var_is_alpha (v))
{
- assert (v->obs_vals != NULL);
+ size_t n_categories = cat_get_n_categories (v);
(dm->vars + i)->last_column =
- (dm->vars + i)->first_column + v->obs_vals->n_categories - 2;
- n_cols += v->obs_vals->n_categories - 1;
+ (dm->vars + i)->first_column + n_categories - 2;
+ n_cols += n_categories - 1;
}
}
dm->m = gsl_matrix_calloc (n_data, n_cols);
Return the index of the variable for the
given column.
*/
-struct variable *
+const struct variable *
design_matrix_col_to_var (const struct design_matrix *dm, size_t col)
{
size_t i;
{
v = dm->vars[i];
if (v.first_column <= col && col <= v.last_column)
- return (struct variable *) v.v;
+ return v.v;
}
return NULL;
}
}
/*
- Set the appropriate value in the design matrix,
+ Set the appropriate value in the design matrix,
whether that value is from a categorical or numeric
variable. For a categorical variable, only the usual
binary encoding is allowed.
gsl_matrix_set (dm->m, row, col, entry);
}
}
+
void
design_matrix_set_numeric (struct design_matrix *dm, size_t row,
const struct variable *var, const union value *val)