Fix bookkeeping of error to make min_impurity_decrease work correctly. #28
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esunshine-q wants to merge 1 commit into
Open
Fix bookkeeping of error to make min_impurity_decrease work correctly. #28esunshine-q wants to merge 1 commit into
min_impurity_decrease work correctly. #28esunshine-q wants to merge 1 commit into
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I have, for a long time, always felt that the hyperparameter
min_impurity_decreasewas behaving incorrectly. It turns out that the parameter/comparison itself was not a problem, but the way we were storing and computing "impurity" was incorrect. This PR corrects the computation of impurity and makes the hyperparameter behave properly.