/*
Functions and data structures to recode categorical variables into
vectors and sub-rows of matrices.
-
+
To fit many types of statistical models, it is necessary
to change each value of a categorical variable to a vector with binary
entries. These vectors are then stored as sub-rows within a matrix
#include <stddef.h>
struct cat_vals;
-struct variable ;
+struct variable ;
union value;
void cat_stored_values_create (const struct variable *);