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.D. Candidate
University of Saskatchewan, Department of Biology,
112 Science Place, Saskatoon, SK., S7N 5E2
"Pluralitas non est ponenda sine neccesitate"
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