Dear list readers,

Please forgive me for asking trivial questions, but I've failed to find the
exact answer by myself. I'm interested in how the species scores are
calculated for ordination configuration in vegan package. It's written they
are weighted averages (of sites scores?): vegan/html/metaMDS.html,
vegan/html/wascores.html.

My questions are:
(1) Are all sites used for calculation of the average, or just those where
the species presents?
(2) What's used as weights: site totals, or the abundances of particular
species which score is calculated?

Thank you in advance,
Stas

--------------------------------------------
Junior Res Asst
Hydrobiology Lab
Institute of Limnology
Russian Academy of Sciences

Sevastyanova 9
196105 Russia, St Petersburg
http://www.limno.org.ru
Phone: +7 (812) 387-80-60
Fax: +7 (812) 388-73-27

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