- struct design_matrix_var *vars; /* Element i is the the variable whose
- values are stored in column i of m. If that
- variable is categorical with more than two
- categories, its values are stored in multiple,
- contiguous columns. In this case, element i is
- the first column for that variable. The
- variable's values are then stored in the
- columns first_column through
- last_column. first_column and last_column for
- a categorical variable are stored in the
- variable's recoded_categorical structure.
+ struct design_matrix_var *vars; /* Element i corresponds to
+ the variable whose values
+ are stored in at least one
+ column of m. If that
+ variable is categorical
+ with more than two
+ categories, its values are
+ stored in multiple,
+ contiguous columns. The
+ variable's values are then
+ stored in the columns
+ first_column through
+ last_column of the
+ design_matrix_var
+ structure.