Having read an online book of some sort on ggplot2, on one of the tidyverse sites, I found the per-function documentation difficult to use and difficult to match to the concepts I had learned. This may be because I'm used to using the parameters section of a function as the primary resource for understanding the inputs. But with ggplot it's scattered in other places, and the holes are not apparent unless you know the specific terminology (not concepts) to match up.
All that said, I find the documentation to be saying a lot more than it did in the past, and it sounds like it has been continually improving.
All that said, I find the documentation to be saying a lot more than it did in the past, and it sounds like it has been continually improving.