3.1.3DC vs 3.1.3
Fragment of a discussion from Talk:DrussGT/Version History
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I would suspect it might make your nearest-neighbours come from multiple perspectives, giving you areas of concavity in your nearest-neighbour function instead of just a pure convex search area. I also suspect using some fancy pre-processing on tree attributes (perhaps dimension reduction/PCA) before adding could give equivalent search patterns.
Skilgannon (talk)