[R] question regarding GAM from a novice (in GAM as well as in R)
Tor A Strand
Tor.Strand at cih.uib.no
Sat Jul 12 18:50:21 CEST 2003
Need to use generalized additive models and have therefore obtained R
I am able to do the analysis but I have problems understanding the syntax
and the options
Can someone explain what some of the terms do in this model do:?
c<-gam(depvar~var1+var2+s(var3)+s(var4, by=var5)+s(var6, var7)+s(var8,3),
I do not use the terms including var4- var8 in my model, just want to know
what they do.
Furthermore, the results become rather different when I change the model to:
c<-gam(depvar~var1+var2-1+s(var3)+s(var4, by=var5)+s(var6, var7)+s(var8,3),
# note just adding a -1
Please forgive my ignorance.
Dr. Tor A Strand
Centre for International Health
University of Bergen
Phone: (country prefix 47)
Residence:56 51 10 88, office: 55 97 49 80,
fax: 55 97 49 79, cellular: 90 97 10 86
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