pre<-predict(ozonea,groupA,type="terms",terms=NULL,newdata.guaranteed=FALSE,na.action=na.pass) yeah! but I don't know how to only show the value of s(ratio,bs="cr") -- View this message in context: http://r.789695.n4.nabble.com/Question-about-GAMs-tp3900848p3903753.html Sent from the R help mailing list archive at Nabble.com.