The massively-online open course (MOOC) platform Coursera has already delivered two essential free courses for anyone who wants to learn the R language. Computing for Data Analysis, presented by Roger Peng, covers the basics of R programming. The follow-up course Data Analysis, presented by Jeff Leek, covers statistical modeling and data visualization with R.
If you missed these courses, one way is to catch up to watch the course videos; we've posted YouTube playlists for Computing for Data Analysis videos and Data Analysis videos here on the blog. But if you want to participate in the full Coursera experience with paced online lectures, quizzes, data analysis assignments, and interaction with more than 100,000 fellow students, the courses will be running again soon. Computing for Data Analysis starts again on September 23 and runs for 4 weeks; Data Analysis starts on October 28 and runs for 8 weeks. Follow the link below for introductory videos for each course, and links to register at Coursera.