question about R: gam in {mgcv}. maximum value of fitted smoothing function??

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Hi all,

I have some difficulties in finding the max s(x). I'm using the code:

fit1=gam(y~treat+SEX+s(x,by=treat),data=dat,
     random=list(SUBJID=~1),correlation=corAR1(form=~1|SUBJID),
     optimizer=c("outer","newton"),method="GCV.Cp")

The bold part, s(x,by=treat) gives us 4 smoothing functions (4 levels in treatments). I would like to find out the maximum value of s(x) in each level.

Anybody could give me some hints??

  Please~  Thanks!!!

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关键词：smoothing question function Maximum smooth value Maximum question GAM smoothing

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can't anyone help  me??