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Online study group community Cramster announced today that the company has raised a $3 million investment and after checking out the site, we can see why. This active, full featured and well design service looks really compelling for students and has a solid business model. Members can participate in forums about homework, get quick answers to questions 24 hours a day and access explanations of problems from more than 200 of the most popular text books in 7 subject areas. There are free and paid membership levels at $10 per month and users deemed helpful by others can receive financial rewards like gift certificates.

R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.