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data-lessons / gapminder-R

http://data-lessons.github.io/gapminder-R/
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Replace variance and relative variation exercises #30

Open michaellevy opened 7 years ago

michaellevy commented 7 years ago

Variance is tricky for some learners, and the wide -> long exercise is too contrived.

michaellevy commented 7 years ago

dplyr and tidyr