Create an ID (row number) column

Question

I need to create a column with unique ID, basically add the row number as an own column. My current data frame looks like this:

   V1  V2
1  23  45
2  45  4         


        

Answer 1

If you're starting without named rows in your df, the tidy way is:

df %>% 
  mutate(id = row_number()) %>% 
  select(id, everything())