The glimpse() function also displays the number of rows and columns in a data frame. There are 234 rows and 11 columns in the mpg data frame. Some of these exercises will be assigned, but we also highly recommend you complete the exercises as you read through the book! These exercises are quite short, and usually have the coded answers built right into the book, so you can copy/paste right into RStudio and see the solution. If you prefer a hardcopy, you can order one from a number of sources as well, including at Amazon.Īs you read through the assigned chapters, the authors have included a variety of practical exercises to introduce you to R, with a focus on the “tidyverse,” a collection of statistical packages that make exploring, analyzing, visualizing, and communicating data a more enjoyable, replicable, and easy-to-learn process. Throughout the remainder of the course, we will be learning and working from the R for Data Science book (you’ll see this book shorthanded as R4DS in this course and all over the web), by two giants of the R space: Hadley Wickham and Garrett Grolemund. One of the wonderful features of the R statistical universe is the number of free, high-quality instructional materials available.
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