Dear R users, I was wondering if anyone knows how to obtain(subset) the first and/or the last record of a subject in a longitudinal setup.
Normally in SAS one uses first.variable1 and last.variable1. So my question is that is there an R way of doing this. Regards, -- Luwis Diya, Phd student (Biostatistics), Biostatistical Center, School Of Public Health, Catholic University of Leuven, U.Z. St Raphael, Kapucijnenvoer 35, B-3000 Leuven, Belgium, Cell: +32(0)497 22 94 83 Phone:+32(0)16 32 68 86 [Office] Phone:+32(0)16 32 98 76 [Home] Fax: +32(0)16 33 70 15 Email: [EMAIL PROTECTED] http://med.kuleuven.be/biostat/staff/LD.htm [[alternative HTML version deleted]] ______________________________________________ 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.
