On Jul 14, 2009, at 2:10 PM, eric.vander...@usask.ca wrote:
> I've been using strata(sampling) and found that if the dataframe to be
> sampled ("data") consists of repeated measures that are not sorted in
> order the run will fail on a given stratum. Ordering the dataframe
> prior to using strata
I've been using strata(sampling) and found that if the dataframe to be
sampled ("data") consists of repeated measures that are not sorted in
order the run will fail on a given stratum. Ordering the dataframe
prior to using strata() eliminates this problem.
Thanks,
Eric
--
Eric Vander Wal
Ph.
