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biofor2
2010 Jul 21
0
Validation in R for GAMM
My GAMM model is to find drivers of species richness in forests is
gamm1<- gamm(Total Species Richness ~ fROT + s(PH) + s(LOI) + ASP +
s(SQRT_ELEV) + CANCOV + s(SQRT_TOTCWD) + s(WELLF) + s(WELLN) +
s(OLDWDLD) + s(DISTWOOD) + s(Annprec), random=list (fSITE =~1), family
= poisson, data = BIOFOR3)
My issues are that the validation graphs are using methods I'm
unfamiliar with e.g. square rooting values and Pearson's residuals.
I'm following as best I can recommendations in Wood 2006 and Zuur 2009
but have some (I think) basic questions on graphical validation:
1. plot sqrt tran...