search for: dayspt3

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2009 May 18
1
Predicting complicated GAMMs on response scale
...,lab=c(24,4,12),las=1,cex.lab=1.5, cex.axis=1,lwd=2) lines(p.d$DaysPT,b$fit+b$se.fit*1.96,lty=2,lwd=1.5) lines(p.d$DaysPT,b$fit-b$se.fit*1.96,lty=2,lwd=1.5) points(DaysPT,Diff) However, when I add a correlation structure and/or a variance structure so that the model may look like:- gamm(Diff~s(DaysPT3)+AirToC,correlation=corCAR1(form=~DaysPT|Animal),weights=varPower(form=~DaysPT),method="REML") I get this message at the point of inputting the line "b<-predict.gam(g.m$gam,p.d,se=TRUE)" Error in model.frame(formula, rownames, variables, varnames, extras, extranames, :...