A nation divided
The USA has a varied climate, so we might expect yields to differ between states. Rather than trying to reason about 50 states separately, we can use the USA Census Regions to get 9 groups.
The "Corn Belt", where most US corn is grown is in the "West North Central" and "East North Central" regions. The "Wheat Belt" is in the "West South Central" region.
dplyr is loaded, the corn and wheat datasets are available, as is usa_census_regions.
Den här övningen är en del av kursen
Introduction to Writing Functions in R
Interaktiv övning med praktiskt arbete
Testa den här övningen genom att slutföra den här exempelkoden.
# Inner join the corn dataset to usa_census_regions by state
corn %>%
___(___, ___ = "___")