\BeginKnitrBlock{rmdnote}<div class="rmdnote">More details are provided in the help pages (which can be accessed via `?summarize` and `vignette(package = "dplyr")` and Chapter 5 of [R for Data Science](http://r4ds.had.co.nz/transform.html#grouped-summaries-with-summarize). </div>\EndKnitrBlock{rmdnote}