Do it all over again
Hopefully, by now, you've realized that the real benefit to writing functions is that you can reuse your code easily. Now you are going to rerun the whole analysis from this chapter on a new crop, barley. Since all the infrastructure is in place, that's less effort than it sounds!
Barley prefers a cooler climate compared to corn and wheat and is commonly grown in the US mountain states of Idaho and Montana.
dplyr and ggplot2, and mgcv are loaded; fortify_with_metric_units(), fortify_with_census_region(), plot_yield_vs_year_by_region(), run_gam_yield_vs_year_by_region(), and predict_yields() are available.
Latihan ini adalah bagian dari kursus
Introduction to Writing Functions in R
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
fortified_barley <- barley %>%
# Fortify with metric units
___ %>%
# Fortify with census regions
___
# See the result
glimpse(fortified_barley)