DSI-Typical Errors

Note

During the class we (collaboratively with students) gather typical errors and discuss how to fix them.

Life cycle might be:

Screenshot set by student -> adding to the file -> discussing how to fix -> reviewing at the start of next lesson -> retrieving on random next lessons (or using the bot)

select(gc, bc) Error in select(gc, bc) : unused argument (bc)

• What happened? we use select from MASS package instead of dplyr
• How to check: ?select, see what package is first
• How to fix?
• dplyr::select
• detach("package:dplyr", character.only = TRUE); library("dplyr", character.only = TRUE)

placement_clean |> + group_by(status, degree_t) |> + ``` Error: attempt to use zero-length variable name

• What happened? We have a pipe at the end of line, leading to nothing