How to mutate a new column by modifying another column?

问题

I have very simple question. I have a df like,

df1 <- data.frame(id=c(1,2,3))

I want to add a new column by adding 'z000' to existing id by using 'mutate' function of dplyr, My expectation is like,

df2 <- data.frame(id=c(1,2,3),new_id=c("z0001","z0002","z0003"))

Please let me know how to do.

回答1:

You just need paste0

df1 %>% 
mutate(new_id = paste0("z000", id))

  id new_id
1  1 z0001
2  2 z0002
3  3 z0003

来源：https://stackoverflow.com/questions/60638082/how-to-mutate-a-new-column-by-modifying-another-column