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...no autocorrelation in the residuals is obviously violated. Does anyone have any ideas how to incorporate these spatial effects in my analysis? I have been reading up on autoregressive techniques, but I am not sure if it works with more than one plot. All help is greatly appreciated! Many thanks, Geertje van der Heijden [[alternative HTML version deleted]]

...ave fitted a model using a glm() approach and using a gls() approach (but without correcting for spatially autocorrelated errors). I have noticed that although these models are the same (as they should be), the AIC value differs between glm() and gls(). Can anyone tell me why they differ? Thanks, Geertje ~~~~ Geertje van der Heijden PhD student Tropical Ecology School of Geography University of Leeds Leeds LS2 9JT Tel: (+44)(0)113 3433345 Email: g.m.f.vanderheijden04@leeds.ac.uk [[alternative HTML version deleted]]

...eal with unequal variance? And if it is better to use a non-parametric analysis, could anyone put me in the direction of the right non-parametric method to use (the relationship between my response variable and the covariates is linear)? Any help on this would be greatly appreciated! Many thanks, Geertje ~~~~ Geertje van der Heijden PhD student Tropical Ecology School of Geography University of Leeds Leeds LS2 9JT Tel: (+44)(0)113 3433345 Email: g.m.f.vanderheijden04@leeds.ac.uk [[alternative HTML version deleted]]

...viate = 0, p-value = 1 alternative hypothesis: two.sided sample estimates: Observed Moran's I Expectation Variance -1.754386e-02 -1.754386e-02 2.125706e-16 Can anyone tell me where I went wrong or if there is another way to generate a nb list? Many thanks, Geertje ~~~~ Geertje van der Heijden PhD student Tropical Ecology School of Geography University of Leeds Leeds LS2 9JT Tel: (+44)(0)113 3433345 Email: g.m.f.vanderheijden04@leeds.ac.uk [[alternative HTML version deleted]]

...ANCOVA the order in which the variables are added to the model matters and that this influences the P-value, but can this make such a big difference? Which P-values are best to use? Also, could this be an indication something is wrong with my model? Any help would be greatly appreciated! Thanks, Geertje ~~~~ Geertje van der Heijden PhD student Tropical Ecology School of Geography University of Leeds Leeds LS2 9JT Tel: (+44)(0)113 3433345 Email: g.m.f.vanderheijden04@leeds.ac.uk [[alternative HTML version deleted]]

...resamples. Does anyone have an idea on how to get this to work? Or is there another easier way to do this? I hope it is clear what I am trying to do! I have tried looking on the internet and in the R archives, but I can't find what I am looking for. Thanks very much in advance for your help! Geertje ~~~~ Geertje van der Heijden PhD student Tropical Ecology School of Geography University of Leeds Leeds LS2 9JT Tel: (+44)(0)113 3433345 Email: g.m.f.vanderheijden04@leeds.ac.uk [[alternative HTML version deleted]]