I have added a couple of cheat sheets. Both are on object oriented programming under R: one on S3 and the other on R5. (I will probably get another lecture for calling reference classes R5, but who cares).As always, if there are any errors, please let me know. I am constantly updating these cheat sheets as my understanding expands in respect of R's deeper mysteries.
Another cheat sheet. This time on R environments, frames and the call stack. At the time of writing, it was the last one in the Google documents directory.Like with my other cheat sheets, please let me know if there are any errors in this one.