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scikit-learn feature importance計算方式應該是損失降低量,而不是分支次數吧? - Cupoy

The importance of a feature is computed as the (no...

ml100-3,ml100-3-d31

scikit-learn feature importance計算方式應該是損失降低量,而不是分支次數吧?

2019/09/28 03:50 AM
機器學習新手論壇
林冠廷
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ml100-3
ml100-3-d31

The importance of a feature is computed as the (normalized) total reduction of the criterion brought by that feature. It is also known as the Gini importance.

想請問下,這是scikit-learn上feature importance的敘述,計算方式似乎比較像是講義pdf中的第三種計算方式:損失降低量,而不是分支次數吧?