Online R resources:
- swirl : learn R interactively from within the R console
- The free “try R” class from Code School is also a good place to start: http://tryr.codeschool.com/
- R reference card (PDF) by Tom Short (more can be found under Short Documents and Reference Cards here)
- Quick-R : Quick online reference for data input, basic statistics, and plots
- Thomas Girke’s R & Bioconductor manuals
- R programming class on Coursera, taught by Roger Peng, Jeff Leek, and Brian Caffo