25.19 Summary

• In this chapter we learned how to write functions for three useful scenarios: creating a vector, creating a data frames, or creating a plot.

• To learn more about programming with tidy evaluation, see useful recipes in programming with dplyr; and programming with tidyr; learn more about the theory in What is data-masking and why do I need

• To learn more about reducing duplication in your ggplot2 code, read the Programming with ggplot2 chapter of the ggplot2 book.

• For more advice on function style, see the tidyverse style guide