I use R. Every day. I think in terms of data.frames, the apply() family of functions, object-oriented programming, vectorization, and ggplot2 geoms/aesthetics. I just started working for an organization that primarily uses SAS. I know there's a book about learning R for SAS users, but what are some good resources for R users who've never used SAS?
15 months ago, I started my current job as someone who had been using R exclusively for about 3 years; I had used SAS in my first-ever stats class, loathed it, and never touched it again until I started here. Here's what has been helpful for me, and what hasn't:
You'll be okay, though. Just read your colleagues' code, ask questions here and on StackOverflow, and - whatever you do - don't try to plot anything.
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A couple things to add to what @matt said:
In addition to SUGI (which is now renamed SAS Global Forum, and will be held this year in Las Vegas) there are numerous local and regional SAS user groups. These are smaller, more intimate, and (usually) a lot cheaper. Some local groups are even free. See here
SAS-L. This is a mailing list for SAS questions. It is quite friendly, and some of the participants are among the best SAS programmers there are.
The book SAS and R: Data Management, Statistical Analysis and Graphics by Kleinman and Horton. Look up what you want to do in the R index, and you'll find how to do it in SAS as well. Sort of like a inter-language dictionary.
In addition to Matt Parkers excellent advice (particularly about reading colleagues code), the actual SAS documentation can be surprisingly helpful (once you've figured out the name of what you want): http://support.sas.com/documentation/
And the Global Forum/SUGI proceedings are available here: http://support.sas.com/events/sasglobalforum/previous/online.html