case_when in mutate pipe

Question

It seems dplyr::case_when doesn\'t behave as other commands in a dplyr::mutate call. For instance:

library(dplyr)

case_when(mtcars         


        

Answer 1

In addition to @akrun's answer above, be aware that the closing parenthesis for the case_when() cannot be put it onto its own line.

For example, this works OK:

mtcars %>%  
   mutate(cg = case_when(
      .$carb <= 2 ~ "low",  .$carb > 2 ~ "high")) 

but this does not:

mtcars %>%  
   mutate(cg = case_when(
      .$carb <= 2 ~ "low",  .$carb > 2 ~ "high")
      )