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Inri said...

I would like to konow how to determine the number of ecological type of species shared by sites in a data frame with variables consisting of species, type (H,F,T),and Sites (A,B,C). I have 75 species noting by presence absence on sites.

Thank you.

Sep 11, 2010, 5:00:50 AM

Posted to Sorting/ordering a data.frame according specific columns