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...> files (based on the current CRAN release 4.1-8) can be downloaded from > https://github.com/krlmlr/rpart/archive/empty-model.zip. > > Thanks for your attention. > > > With kindest regards > > Kirill M?ller In general I try to make functions behave in edge cases, so am symptatheic to your request. But I won't get to it for months at least, even if I say yes. Brian Ripley is the official maintainer of rpart at this time, send a note directly to him. If neither Brian nor I can fit it in, no one else will. Terry Therneau