On Multilabel Classification and Ranking with Bandit Feedback
Claudio Gentile, Francesco Orabona; 15(70):2451−2487, 2014.
Abstract
We present a novel multilabel/ranking algorithm working in partial information settings. The algorithm is based on 2nd- order descent methods, and relies on upper-confidence bounds to trade-off exploration and exploitation. We analyze this algorithm in a partial adversarial setting, where covariates can be adversarial, but multilabel probabilities are ruled by (generalized) linear models. We show $O(T^{1/2}\log T)$ regret bounds, which improve in several ways on the existing results. We test the effectiveness of our upper-confidence scheme by contrasting against full-information baselines on diverse real- world multilabel data sets, often obtaining comparable performance.
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