[R] select a subset

From: gallon li <gallon.li_at_gmail.com>
Date: Mon, 24 Nov 2008 17:15:56 +0800


I have the complete data like

id time censor
1 10 0
1 20 0
1 30 0
2 10 0
2 20 1
2 30 0
2 40 0
3 10 0
3 20 0
3 30 1
....

for id 1, i want to select the last row since all censor indicator is 0; for id 2, i want to select the row where censor ==1; for id 3, i also want to select the row where censor==1. So if there is a 1 for censor, then I want to select such a row, otherwise I want to select the last obs. for this id. I am wondering if there is a quick way to solve this?

        [[alternative HTML version deleted]]



R-help_at_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. Received on Mon 24 Nov 2008 - 09:19:00 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Tue 25 Nov 2008 - 18:30:28 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive