Compute the set of pairwise dissimilarities across all observations in a tree. Each dissimilarity measures the extent to which observations are "far apart" in the tree: the dissimilarity is 0 if the pair land in the same leaf, 1 if they land on leaves that have only the root as common ancestors, and otherwise something intermediate.
Output from "tree"
If TRUE return the matrix of pairwise distances among leaves. Useful for debugging. Default FALSE.
Two observations have distance 0 if they fall in the same leaf; otherwise, the distance measures the ratio of the deviance of a tree trimmed so that they do fall in the same leaf to the deviance of the original tree.
Item of class "dist" giving inter-point distances.
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