7. Statistical Graphics
One of the hardest parts of an analysis is producing quality supporting graphics. Conversely, a good graph is one of the best ways to present findings. Fortunately, R provides excellent graphing capabilities, both in the base installation and with add-on packages such as lattice and ggplot2. We will briefly present some simple graphs using base graphics and then show their counterparts in ggplot2. This will be supplemented throughout the book where supporting graphics—with code—will be made using ggplot2 and occasionally base graphics.
Graphics are used in statistics primarily for two reasons: exploratory data analysis (EDA) and presenting results. Both are incredibly important but must be targeted to different audiences. ...
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