Online nearest neighbor classification

3 Jul 2023  ·  Sanjoy Dasgupta, Geelon So ·

We study an instance of online non-parametric classification in the realizable setting. In particular, we consider the classical 1-nearest neighbor algorithm, and show that it achieves sublinear regret - that is, a vanishing mistake rate - against dominated or smoothed adversaries in the realizable setting.

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