Exercise

Filter the data for plotting

Use the filter() function of dplyr to remove non-European countries. A vector called european_countries has been created that contains all European countries which should remain in the data set. Here, the %in% operator introduced in the video might come in handy. Note that only a subset of European countries for which enough data exist is retained. For instance, Poland is missing.

Instructions

100 XP

Print european_countries to the console.
Apply the filter() function to only retain countries which also appear in the european_countries vector. Use the %in% operator to retain only values that appear in the right-hand side of the operator.