[R-sig-Geo] Group-wise error variance and autocorrelation

Tim Keitt tkeitt at gmail.com
Wed Jul 18 17:09:34 CEST 2007


I'm trying to specify a model where the fixed effects are

dep ~ group + group:indep

and the error variance and spatial autocorrelation vary by group. I've
tried lme but AFAICT it only supports heteroscedasticity and
autocorrelation within groups. Any pointers?

THK

-- 
Timothy H. Keitt, University of Texas at Austin
Contact info and schedule at http://www.keittlab.org/tkeitt/
Reprints at http://www.keittlab.org/tkeitt/papers/
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