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PAC-Bayes Tree: weighted subtrees with guarantees
Tin Nguyen · Samory Kpotufe

Wed Dec 05 07:45 AM -- 09:45 AM (PST) @ Room 517 AB #109

We present a weighted-majority classification approach over subtrees of a fixed tree, which provably achieves excess-risk of the same order as the best tree-pruning. Furthermore, the computational efficiency of pruning is maintained at both training and testing time despite having to aggregate over an exponential number of subtrees. We believe this is the first subtree aggregation approach with such guarantees.

Author Information

Tin Nguyen (MIT)
Samory Kpotufe (Princeton University)

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