Displaying 1 result from an estimated 1 matches for "alongitudin".
Did you mean:
alongitudinal
2008 Aug 07
4
Obtaining the first /or last record of a subject in a longitudinal study
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