[R-sig-Geo] Using SEVs in GAMs

[jtm6 at u.washington.edu]

Hello,

Can anybody give an explanation of why spatial eigenvectors (SEVs) such those produced by ME() in package "spdep" can not be used in general additive models (gams)and only in linear models? I think I understand  generally why (the SEVs are orthogonal and linearly independent) but I would love to hear from a more knowledgeable person.

many thanks in advance,
James