ISO-3 of all the countries in R

Question

I am trying to make a map that looks like so where can I get the ISO-3 of all the countries. many thanks in advance.

Answer 1

You could use this code:

library(rnaturalearth)
countries <- ne_countries()
countries@data[["iso_a3"]]

More info about the package rnaturalearth: https://docs.ropensci.org/rnaturalearth/articles/rnaturalearth.html