Working with packages
Robust, performant, and numerous though base R's functions are, we are by no means limited to them! Additional functionality is available in the form of packages. In fact, what makes R such a formidable statistics platform is the astonishing wealth of packages available (well over 7,000 at the time of writing). R's ecosystem is second to none!
Most of these myriad packages exist on the Comprehensive R Archive Network (CRAN). CRAN is the primary repository for user-created packages.
One package that we are going to start using right away is the ggplot2 package. ggplot2 is a plotting system for R. Base R has sophisticated and advanced mechanisms to plot data, but many find ggplot2 more consistent and easier to use. Further, the ...
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