R tutorials for lab 2014-09-18

I plan to teach all of R_Training_1, some of which is a review from last week. Then, depending on how well the class is understanding the material, I may move to some examples in R_Training_2.  I'm going to revise R_Trainig_2 to reduce the engineering jargon and streamline.  The focus will be data.frame manipulation and ggplot, not engineering concepts ; ).