Easily add a categorical covariate to a data frame
add_factor(data, x, id_var = "id")
| data | the original data frame |
|---|---|
| x | A named vector containing the category for each individual. The names should specify the individual id. |
| id_var | name of the id variable in |
A data frame with one column added. The new column will
have same name as the variable passed as input x.
Other data frame handling functions:
add_dis_age(),
add_factor_crossing(),
adjusted_c_hat(),
new_x(),
split()