I have found this to be an excellent tutorial: http://tutorials.iq.harvard.edu/R/Rgraphics/Rgraphics.html http://tutorials.iq.harvard.edu/R/Rgraphics/Rgraphics.

I have found this to be an excellent tutorial: http://tutorials.iq.harvard.edu/R/Rgraphics/Rgraphics.html http://tutorials.iq.harvard.edu/R/Rgraphics/Rgraphics.html It explains the use but also the philosophy and design pretty well.