group_by() into fill() not working as expected

Question

I\'m trying to do a Last Observation Carried Forward operation on some poorly formatted data using dplyr and tidyr. It isn\'t working as I\'d expe

Answer 1

This is kind of ugly, but it is another option that uses dplyr and works with your sample data

df %>%
   group_by(id) %>%
   mutate(email = email[ !is.na(email) ][1])