Nuclear bombs per continent
Since WWII, a number of nations have been detonating nuclear bombs for military research. A tally of bombs detonated per nation has been calculated from the Nuclear Explosion DataBase (NEDB) and provided as nuke_df. You are interested in finding out how many bombs have been detonated by nations grouped per continent. To achieve this goal, nuke_df will be joined to country_to_continent_df which is a mapping of nation to continent. You will need to overwrite missing values with zeros so that you can create a nice plot.
The dplyr and ggplot2 packages have been pre-loaded for you.
Side note 1: Bombs detonated by the Soviet Union were attributed to the Russian Federation.
Side note 2: The Russian Federation is solely mapped to Europe for simplicity.
Este exercício faz parte do curso
Reshaping Data with tidyr
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
country_to_continent_df %>%
left_join(nuke_df, by = "country_code") %>%
# Impute the missing values in the n_bombs column with 0L
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