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...he lme function to examine a linear relationship between two variables measured at 60 locations in 12 sites, while taking account of any spatial autocorrelation (i.e. similarity in variation between the two variables that is due to site). I am using the function as follows: model<-lme(yvariable~xvariable,random=~xvariable|site) If you know your way around this function, I would be very grateful if you could confirm that this approach is a valid one, or point out why it isn't. I'd also be very keen to hear any suggestions regarding alternative ways to address the spatial autocorrelation in...