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Alex Rivera
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There are several nearest neighbor R packages (e.g., FNN, RANN, yaImpute) but none of them seem to allow saving off the NN data structure (cover tree, KD tree etc.) so that the nearest neighbors of new queries can be calculated without reconstructing the whole tree. Are there any such functions in R? I am looking for a function that returns a data structure that I can update incrementally as new data arrives to perform approximate K nearest neighbor search.
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