[R-sig-eco] 'grouping' grouping variable
Jakub Szymkowiak
qbaszym at tlen.pl
Fri Dec 16 12:12:24 CET 2011
Thanks for every comments and ideas!
Robera - woodland and meadows were only an example. I have also variables
describing e.g. area of rye, wheat, barley cultivation, but I agree - all my
variables describe habitat use in every region.
I have also a data about birds (4 species) - in every region, birds were
countend on study plots (1km squares). The number of study plots vary
between regions.
Cheers,
Jakub
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