I created a dendrogram (ddg0) using hclust in the usual way. I want to collapse UP the tree in various ways, that is, from the leaves up to the root. Optimally, I would give the id of a member of a final split in ddg0, and return a new ddg1 with that split collapsed. Alt, I could give a depth to collapse up to (such that ddg1 would have n fewer levels than ddg0). That sort of thing. I could, of course, program this myself, but it seems like something that is so obviously needed that there is very likely to be a package that does it already. Is there? TIA 'Jeff
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