Comments (3)
Ah, one of the models that I had not gotten around to writing a test for :)
In any case I can see the issue. shap.TreeExplainer(model).expected_value
outputs array([-0.5844817])
. For most binary classification models expected_value
outputs a np.ndarray([float probability/logodds negative class, float probability/logodds positive class])
, or simply a float with the probability/logodds of the positive class. However, for GradientBoostingClassifier
for some reason it outputs an np.ndarray([logodds positive class])
. Had not taken care of that corner case yet. (I think shap tries to follow the output format of the underlying model, but this does lead to some confusing heterogeneity in outputs formats)
In any case will add some code to autodetect this (and also force GradientBoostingClassifier to outputs probabilities by default and add some integration tests for GradientBoostingClassifier and HistGradientBoostingClassifier).
Thanks for letting me know, and let me know if you run into any other issues with other models!
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released a fix with version 0.1.13
Seems to work on my end, let me know if it works for you as well..
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Works for me! I am astonished by the speed of your response.
Best
James
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Related Issues (20)
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