I love McElreath’s Statistical Rethinking text. It’s the entry-level textbook for applied researchers I spent a couple years looking for. McElreath’s freely-available lectures on the book are really great, too.
However, I’ve come to prefer using Bürkner’s brms package when doing Bayeisn regression in R. It’s just spectacular. I also prefer plotting with Wickham’s ggplot2, and recently converted to using tidyverse-style syntax (which you might learn about here or here).
So, this project is an attempt to reexpress the code in McElreath’s textbook. His models are re-fit in brms, plots are reproduced or reimagined with ggplot2, and the general data wrangling code now predominantly follows the tidyverse style.