The target audience is anyone who wants to do high-quality data visualization, but hasn't memorized every command and doesn't want to spend lots of time searching the internet every time they make a graph. This includes scientists, engineers, computer programmers, and data analysts of all kinds. The target skill level ranges from those who have just learned the basics of R to those who are experts. Even those of us who work with R on a daily basis can benefit from a cookbook-style reference.
The target audience is anyone who wants to do high-quality data visualization, but hasn't memorized every command and doesn't want to spend lots of time searching the internet every time they make a graph. This includes scientists, engineers, computer programmers, and data analysts of all kinds. The target skill level ranges from those who have just learned the basics of R to those who are experts. Even those of us who work with R on a daily basis can benefit from a cookbook-style reference.