Hi, I am trying to use cyclic splines in gamm4 to model year day. I have data running from say day 6 to day 300 but I want to specify the outer limits of the data are at 0 and 366. I dont want to fix the inner position of the knots however (I allow for a total of 5 knots). Is there a way to do this? I also have other explanatory variables in the model that are not cyclic.
Example: Model<-gamm4(Y~s(X1,fx=FALSE,k=5,bs="cc")+s(X2,fx=FALSE, k=5, bs='cr')+offset(log(X3)),random=~(1|X4),data=data,family=poisson) Finally when I try to plot the predictions on the response scale the values predicted at 0 and 366 are vastly different and do not match, as when outputs using plot(Model$gam,se=TRUE). Any help on this would be much appreciated. Cheers Sam -- View this message in context: http://r-sig-ecology.471788.n2.nabble.com/GAM-Cyclic-splines-tp7579269.html Sent from the r-sig-ecology mailing list archive at Nabble.com. _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology