The "tree" package has a nice function partition.tree() for drawing the (1D or) 2D partition in the case of only (one or) two predictors {See the examples in help(partition.tree)}. {and so does S-plus (not in a separate package though)}. It seems to me that there's no function with similar functionality available for rpart. Am I mistaken? Has anyone worked on this? One possible approach might be to provide an as.tree() function for "rpart" objects and then use partition.tree() from the "tree" package. Given that "rpart" is a recommended R package, I'd rather prefer to have a `standalone' function working with "rpart" objects. BTW: an optimal name for that function is not clear: partition.tree could be used, since it's a simple function, not a "tree" method for a "partition" generic. parition.rpart() could be used as well. But for me, a generic partition() function shouldn't be used to draw (1- or) 2-partitions. If generic/method, I'd prefer a naming scheme something like plotPart[.(rpart|tree)]. Feedback very welcome. Martin Maechler <maechler at stat.math.ethz.ch> http://stat.ethz.ch/~maechler/ Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27 ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND phone: x-41-1-632-3408 fax: ...-1228 <><