During this course we'll be using the swirl software package for R in order to illustrate some key concepts. The swirl package turns the R console into an interactive learning environment. Using swirl will also give you the opportunity to be completely immersed in an authentic R programming environment. In this programming assignment, you'll have the opportunity to practice some key concepts from this course.
• Swirl requires R 3.0.2 or later. If you have an older version of R, please update before going any further. If you're not sure what version of R you have, type R.version.string at the R prompt. You can download the latest version of R from https://www.r-project.org/.
• Optional but highly recommended: Install RStudio. You can download the latest version of RStudio at https://www.rstudio.com/products/rstudio/.
Since swirl is an R package, you can easily install it by entering a single command from the R console:
install.packages("swirl")If you've installed swirl in the past make sure you have version 2.2.21 or later. You can check this with:
packageVersion("swirl")Every time you want to use swirl, you need to first load the package. From the R console:
library(swirl)Swirl offers a variety of interactive courses, but for our purposes, you want the one called R Programming. Type the following from the R prompt to install this course:
install_from_swirl("R Programming")Type the following from the R console to start swirl:
swirl()