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2009 Sep 14
0
invalid type (list) for variable
...actor terms; I cannot, however, figure out how to add interactions between continuous*factor terms. I applied a smoother to my continuous term because it has a non-linear trend over time. Below is an example of my attempt, followed by the error message: MMF.Test <- gamm(MaxDepth ~ s(TripTime) + Trtmt + s(TripTime):Trtmt, random = list(Seal =~1), method = "REML", data = EsealsAll) "Error in model.frame.default(formula = MaxDepth ~ Trtmt + s(TripTime):Trtmt + : invalid type (list) for variable 's(TripTime)' In addition: Warn...