Re: [R] data selection

ID B101 B2A B2B B2C #199 598   NA  NA  NA  NA #200 599   NA  NA  NA   8 #201 600   NA   2  NA   4 A.K. - Original Message - From: Robert Lynch To: r-help@r-project.org Cc: Sent: Tuesday, June 18, 2013 8:16 PM Subject: [R] data selection I have two different data frames ( actually a

[R] data selection

I have two different data frames ( actually a set of data frames for each class and one master one into which i want pull some data from each of the frame in the set) one is all students that have taken a course so the set of data frames is B101 B2A B2B B2C etc. . . and each one has lots of da