Dear all, I am trying to analyze a Y matrix of fish abundanceof different fish species vs. an X matrix of environmental variables using PLS regression,implemneted inthe pls.pcr package.Some of my environmental variables are continuous and some are categorical. Is it possible tomix continuous and categorical variables (transformed as dummy) in the X matrix? Any helpwill be greatly appreciated. Best regards David -- Lic. David E. Galván Centro Nacional Patagónico - CONICET Blvd s/n 9120 - Puerto Madryn - Chubut - Argentina tel:054-2965-451024 fax:054-2965-451543 -- [[alternative HTML version deleted]]