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  2. 강의
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  3. Reshaping Data with tidyr
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연습 문제

Nuclear bombs per country

You've been given a version of the Nuclear Explosion DataBase (NEDB) where country names are specified in the column headers (nuke_df). You want to visualize how many nukes were detonated per year per country. You'll need to pivot the data and replace NA values first.

The ggplot2 package has been pre-loaded for you.

Nuclear explosion at Bikini

"A-Day" First atomic bomb explosion at Bikini in the Marshall Islands 1 July 1946.

Photo by Science in HD

지침 1/4

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  • Pivot all columns except for year to a longer format.