I'd like to be able to specify a col_type for the my_col column. At present I can't do this because in cols() I need the string contained within the object my_col, not the string "my_col".
I'd like to be able to specify a col_type for the my_col column. At present I can't do this because in cols() I need the string contained within the object my_col, not the string "my_col".