Hello,

   I am trying to use metaMDS (or isoMDS) for a community data set with 10 species.  However, I have several sites with no species present (empty rows), and this seems to present a problem in the dissimilarity matrix in the form of missing values.  Does anyone have suggestions on how to deal with this?  Is it appropriate to create a dummy variable in the original community matrix?  If so, what is the best way to do this?  Thanks for any help.



Tracy Pinney



PhD candidate

Department of Biology

Baylor University

One Bear Place 97388-7388

Waco, TX  76798-7388


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