If you've thought about learning the R language but didn't know how to start, there's a new, free course on edX that starts you from the R basics and lets you learn R by trying R as you go.
Presented by DataCamp and Microsoft, the course starts from the very basics of R (arithmetic on the command line, creating variables), progresses through the basic data types (vector, matrix, factor, list and data frame) and ends with a module on data visualization. The course consists of lecture-style videos interspersed with quizzes to test your knowledge. And best of all, you can try out what you've learned at the R command line using the DataCamp online interface -- so you don't even have to install R yourself! A browser is all you need.
It's perfect for newcomers to R, even if you don't have experience in other programming languages. If you want to get a (paid) certification you'll need to complete the course by September 1, but you can view all of the course materials, quizzes and labs anytime for free. You can learn more about the course at the DataCamp blog or get started now at the link below.