Get continent name from country name in R

Question

I have a data frame with one column representing country names. My goal is to add one more column which gives the continent information. Please check the following use case:

Answer 1

You can try

my.df <- data.frame(country = c("Afghanistan","Algeria"),
                    continent= as.factor(c("Asia","Africa")))
merge(my.df, raster::ccodes()[,c("NAME", "CONTINENT")], by.x="country", by.y="NAME", all.x=T)
#       country continent CONTINENT
# 1 Afghanistan      Asia      Asia
# 2     Algeria    Africa    Africa

Some country values might need an adjustment; I dunno since you did not provide all values.