Adding a column with consecutive numbers in R

Question

I apologize if this question is abhorrently simple, but I\'m looking for a way to just add a column of consecutive integers to a data frame (if my data frame has 200 observation

Answer 1

Probably, function tibble::rowid_to_column is what you need if you are using tidyverse ecosystem.

library(tidyverse)
dat <- tibble(x=c(10, 20, 30), 
              y=c('alpha', 'beta', 'gamma'))
dat %>% rowid_to_column(var='observation')

# A tibble: 3 x 3
  observation     x y    
          
1           1    10 alpha
2           2    20 beta 
3           3    30 gamma