Hi Erin, See inline.
On Mon, Jun 20, 2011 at 8:45 PM, Erin Hodgess <erinm.hodg...@gmail.com> wrote: > Dear R People: > > I have a data frame, xm1, which has 12 rows and 4 columns. > > If I put is xm1[,-4], I get all rows, and columns 1 - 3, which is as > it should be. Okay, so you know how to use the column number to omit columns. > > Now, is there a way to use the names of the columns to omit them, please? You have all the pieces (the column names, and the knowledge that you can omit columns by their index). Homework: find a way to return the column numbers given the column names (hint). Cheers, Josh > > Thanks so much in advance! > > Sincerely, > Erin > > > -- > Erin Hodgess > Associate Professor > Department of Computer and Mathematical Sciences > University of Houston - Downtown > mailto: erinm.hodg...@gmail.com > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
