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...es and names<-. Internally, the names can be stored as row names. Further useful methods for "Surv" objects might include - as.double/as.integer (presumably just extracting the "time"), - c - str Possibly also a dedicated summary. An example for such a class is our "paircomp" in "psychotools". But I'm sure there are other/better examples elsewhere. Best, Achim

I have some data I would like to model which involves choice of food by dung beetles. There are a number of experiments where in each case, there are five choices. Overall there are more than 5 different foods being compared (including a placebo) and different experiments use different comparisons. The problem is a generalization of Bradley-Terry but it differs from some generalizations in

I now understand the issue, which leads to a different and deeper issue which is "how to assign a proper length to Surv objects". > Surv(c(1,2,3), c(1,0,1)) [1] 1? 2+ 3 The above prints as 3 elements and is conceptually 3 elements. But if I give it length method to return a 3 then I need a names method, and names<-? pays no attention to my defined length. How do we conceive