[R] mgcv predict.bam strange results

[fwickler]

Dear useR,

I don't understand the results of the predict.bam function of mgcv package
when constucting a varying-coefficient model with bam instead of gam:

 library("mgcv")
dat <- gamSim(4)
b <- gam(y ~ fac+s(x2,by=fac)+s(x0), data=dat)
predict(b, dat[1,], type = "terms")

with gam everything is fine: only s(x2):fac1 is different of zero but using
bam:

b1 <- bam(y ~ fac+s(x2,by=fac, bs = "cc")+s(x0),data=dat)
predict(b1, dat[1,], type = "terms")

all terms s(x2):fac1, s(x2):fac2  and s(x2):fac3 are differnt of zero.

Thanks for your help
Florian





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