Dear all, Thanks very much for the replies and for the help.
This whole data set consists of about 7000 individuals who have had multiple blood pressure measures taken over time so I just used one individual as an example. I'm sorry if it looked like homework...it isn't. Jim your solution worked really well thanks. I was thinking of things in terms of diff time and not order, so thanks. Natalie -- View this message in context: http://r.789695.n4.nabble.com/Finding-the-two-most-recent-dates-tp2528185p2528417.html Sent from the R help mailing list archive at Nabble.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.
