There is huge of R books and stuff out there and a lot of it is thankfully also free. During the different TR courses this material can be quite useful. With this post I want to start an ongoing exchange of this material. I would be interested what kind of education or teaching material you use if you have to look something up.


Free and good R books:

http://www.r-bloggers.com/5-interesting ... o-experts/

And a very good page for questions which popping up during lectures:
http://stackoverflow.com/

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" Nur durch beständige Ausführung des scheinbar Unmöglichen kann der Erfolg gesichert werden."  (Peter Kropotkin)