Emergent Mind
SHAP for additively modeled features in a boosted trees model
(2207.14490)
Published Jul 29, 2022
in
stat.ML
and
cs.LG
Abstract
An important technique to explore a black-box ML model is called SHAP (SHapley Additive exPlanation). SHAP values decompose predictions into contributions of the features in a fair way. We will show that for a boosted trees model with some or all features being additively modeled, the SHAP dependence plot of such a feature corresponds to its partial dependence plot up to a vertical shift. We illustrate the result with XGBoost.
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