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

As of version 0.7.0 of dplyr, case_when works within mutate as follows:

library(dplyr) # >= 0.7.0
mtcars %>% 
  mutate(cg = case_when(carb <= 2 ~ "low",
                        carb > 2  ~ "high"))

For more information: http://dplyr.tidyverse.org/reference/case_when.html