As some of my friends & colleagues know, I've moved nearly all of my experimental analysis and graphing to "R" <http://www.r-project.org/>. Being no statistician, nor mathematician, this was (still is) uphill work, though with great rewards on the way. These "R2torials" are great – funny, insightful, rapid, and more than the occasional pearl to advance my undeRstanding.

http://www.twotorials.com/2012/05/ninety-two-minute-r-tutorial-videos.html