Hi R-users,
I'm using R 2.11.1, mgcv 1.6-2 to fit a generalized additive mixed model.
I'm new to this package...and just got more and more problems...
1. Can I include correlation and/or random effect into gam( ) also? or only
gamm( ) could be used?
2. I want to estimate the smoothing function s(x) under each level of
treatment. i.e. different s(x) in each level of treatment. shall I use s(x,
by=treatment)? When I checked the basis expansion I found they are all the
same...but shouldn't be the same right?
3. fit=gam(.......)
basis=fit$smooth
par=basis[[1]]$xp
Here, is "par" the vector of knots...? Where can I find the fitted coef
of smoothing function..??
Thank you all and any hint/help will be appreciated...
--
Best,
Xia
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