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chel
2010 Jun 18
2
varIdent error using gam function in mgcv
...hts to variable Month I get this
error returned.
Error in model.frame.default(formula = Chel ~ 1 + M + YM + M + YM, weights =
Vf1, :
variable lengths differ (found for '(weights)')
Here is the simple code I am using.
library(mgcv); library(lattice)
library(nlme)
Vf1=varIdent(form=~M)
Chel2=gam(Chel~s(M, fx=F, bs="tp")+ s(YM, fx=F, bs="tp")+s(M,YM, fx=F,
bs="tp"), family=poisson(link="log"), weights=Vf1) # second GAM with
interaction
M=Month
YM=Year
Regards,
Niall
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