Details
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Sub-task
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Status: Resolved
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Major
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Resolution: Incomplete
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None
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None
Description
.As an initial minimal change, we should provide TreeBoost as implemented in GBM for L1, L2, and logistic losses: by introducing a new "loss-based" impurity, tree leafs in GBTs can have loss-optimal predictions for their partition of the data.
Commit should have evidence of accuracy improvment