1.4 What you will not learn
This book is about R the programming language, not R the data analysis tool. If you are looking to improve your data science skills, I instead recommend that you learn about the tidyverse, a collection of consistent packages developed by me and my colleagues. In this book you’ll learn the techniques used to develop the tidyverse packages; if you want to instead learn how to use them, I recommend R for Data Science.
If you want to share your R code with others, you will need to make an R package. This allows you to bundle code along with documentation and unit tests, and easily distribute it via CRAN. In my opinion, the easiest way to develop packages is with devtools, roxygen2, testthat, and usethis. You can learn about using these packages to make your own package in R packages.