Re: [R] seeking tip to keep first of multiple observations per ID

2013-03-15 Thread pedroabg
I had the same problem. -- View this message in context: http://r.789695.n4.nabble.com/seeking-tip-to-keep-first-of-multiple-observations-per-ID-tp4661520p4661534.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org m

Re: [R] seeking tip to keep first of multiple observations per ID

2013-03-15 Thread arun
A.K. - Original Message - From: Julie Royster To: r-help@r-project.org Cc: Sent: Friday, March 15, 2013 12:06 PM Subject: [R] seeking tip to keep first of multiple observations per ID Dear R community, I am a neophyte and I cannot figure out how to accomplish keeping only the first record for e

Re: [R] seeking tip to keep first of multiple observations per ID

2013-03-15 Thread John Kane
[R] seeking tip to keep first of multiple observations per ID > > Dear R community, > > I am a neophyte and I cannot figure out how to accomplish keeping only > the > first record for each ID in a data.frame that has assorted numbers of > records per ID. > > I studied

[R] seeking tip to keep first of multiple observations per ID

2013-03-15 Thread Julie Royster
Dear R community, I am a neophyte and I cannot figure out how to accomplish keeping only the first record for each ID in a data.frame that has assorted numbers of records per ID. I studied and found references to packages plyr and sql for R, and I fear the documentation for those was over my head