two letter country code in r

To obtain the two-letter country codes in R, you can use the countrycode package. The countrycode package provides a simple and efficient way to convert country names to country codes and vice versa.

Here are the steps to obtain the two-letter country codes in R:

1. Install the countrycode package by running the following code:

install.packages("countrycode")

1. Load the package into your R session using the library function:

library(countrycode)

1. Use the countrycode function to convert country names to two-letter country codes. The function takes three arguments: sourcevar (the variable containing the country names), origin (the origin country code), and destination (the destination country code). In this case, since we want to convert country names to two-letter country codes, we'll set origin to "country.name" and destination to "iso2c". Here's an example:

country_names <- c("United States", "United Kingdom", "Canada")
country_codes <- countrycode(sourcevar = country_names, origin = "country.name", destination = "iso2c")

1. The countrycode function will return a vector of two-letter country codes corresponding to the input country names. In the example above, country_codes will contain the values "US", "GB", and "CA".

That's it! You now have the two-letter country codes for the specified country names using R and the countrycode package.