the total number of distinct values of each categorical variable should
be considered.
*/
-const struct variable * categoricals_get_variable_by_subscript (const struct categoricals *cat, int subscript);
-
double categoricals_get_weight_by_subscript (const struct categoricals *cat, int subscript);
const struct interaction *categoricals_get_interaction_by_subscript (const struct categoricals *cat, int subscript);