The R Function of Day blog highlights interesting and helpful functions in an easy-to-digest framework. Functions are introduced with a short description, their most important arguments, and an example. Follow @RFunction, or visit the Google+ page. R code on this blog is licensed via GPL-2, GPL-3, and CC BY 3.0 licenses, where you are welcome to pick one or more of these licenses for your use and/or redistribution. The non-code text of the blog is licensed under a CC BY-SA 3.0 license. If these licenses are insufficient for a use case you have in mind, email me and I’m likely to provide a waiver for your particular use.