Computer scienceData scienceMachine learningClassificationDecision tree learning

Gini index

Theory

Step by step

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Put the steps of selecting the feature for a split in the correct order.

Put the items in the correct order
Pick a feature
Select the feature that has a lower Gini index to make the best split
Calculate the Gini index for all possible pairs of the type "the target variable - a categorical feature"
Repeat the previous steps for all features in a dataset
Calculate the weighted gini index of each categorical feature
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