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), data=xdataset ) I do not use the terms including var4- var8 in my model, just want to know what they do. +s(var4, by=var5) +s(var6, var7) +s(var8,3) 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), data=xdataset ) # note just adding a -1 Why. Please forgive my ignorance. Dr. Tor A Strand Centre for International Health Haukeland Hospital University of Bergen 5021 Bergen Norway Phone: (country prefix 47) Residence:56 51 10 88, office: 55 97 49 80, fax: 55 97 49 79, cellular: 90 97 10 86 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
