How to add a row names to a data frame in a magrittr chain

Question

I want to do the opposite of: Convert row names into first column

Somewhere down the chain of pipes I would like to add row names to the data frame, for example, I w

Answer 1

To actually "do the opposite of: Convert row names into first column" as stated at the top, i.e. turn a column of data into the row names, you'll want tibble::column_to_rownames(), which fits into pipes nicely. (I know your example specified something else, i.e. turning a sequence of numbers into the row names, for which you should use the other answers)

library(tidyverse)
starwars %>% column_to_rownames("name") %>% head()
#>                height mass  hair_color  skin_color eye_color birth_year
#> Luke Skywalker    172   77       blond        fair      blue       19.0
#> C-3PO             167   75                gold    yellow      112.0
#> R2-D2              96   32         white, blue       red       33.0
#> Darth Vader       202  136        none       white    yellow       41.9
#> Leia Organa       150   49       brown       light     brown       19.0
#> Owen Lars         178  120 brown, grey       light      blue       52.0
#>                gender homeworld species
#> Luke Skywalker   male  Tatooine   Human
#> C-3PO              Tatooine   Droid
#> R2-D2                 Naboo   Droid
#> Darth Vader      male  Tatooine   Human
#> Leia Organa    female  Alderaan   Human
#> Owen Lars        male  Tatooine   Human
#>                                                                                                                                                    films
#> Luke Skywalker                                           Revenge of the Sith, Return of the Jedi, The Empire Strikes Back, A New Hope, The Force Awakens
#> C-3PO                             Attack of the Clones, The Phantom Menace, Revenge of the Sith, Return of the Jedi, The Empire Strikes Back, A New Hope
#> R2-D2          Attack of the Clones, The Phantom Menace, Revenge of the Sith, Return of the Jedi, The Empire Strikes Back, A New Hope, The Force Awakens
#> Darth Vader                                                                 Revenge of the Sith, Return of the Jedi, The Empire Strikes Back, A New Hope
#> Leia Organa                                              Revenge of the Sith, Return of the Jedi, The Empire Strikes Back, A New Hope, The Force Awakens
#> Owen Lars                                                                                          Attack of the Clones, Revenge of the Sith, A New Hope
#>                                          vehicles                starships
#> Luke Skywalker Snowspeeder, Imperial Speeder Bike X-wing, Imperial shuttle
#> C-3PO                                                                     
#> R2-D2                                                                     
#> Darth Vader                                                TIE Advanced x1
#> Leia Organa                 Imperial Speeder Bike                         
#> Owen Lars

^{Created on 2019-03-18 by the reprex package (v0.2.1)}