CLN GBDTs: don't split on last bin (explicitly) #13919
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jnothman
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May 22, 2019
thomasjpfan
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May 30, 2019
koenvandevelde
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In the new GBDTs, splitting on the last bin is useless since it would result in having 0 samples on the right node, which is forbidden.
This PR makes it explicit. (Before, the last bin would be implicitly skipped since we have the condition
if n_samples_right < min_samples_leaft: break). I'd rather make it explicit, since it made me introduce a bug while working on #13911