(Builds on: Visualisation basics (2))
(Leads to: Perception, Grouped summaries, ggplot2 themes)
Now is a good time to learn a bit more about the underlying theory of ggplot2. Read these two short chapters to familiarise yourself with the theory and learn some useful vocabulary.
Mastering the grammar [ggplot2-4]
Build a plot layer by layer [ggplot2-5]