Rearrange rows in data frame

Question

I have a data frame in R which looks like this with two columns:

ID     phone_number
Mark     866458
Paul     986564
Jack     987543
Mary     523422
<         


        

Answer 1

One possibility with tidyverse:

df %>%
 rowid_to_column() %>%
 gather(var, val, -rowid) %>%
 arrange(rowid) %>%
 select(val)

     val
1   Mark
2 866458
3   Paul
4 986564
5   Jack
6 987543
7   Mary
8 523422