How can I handle rare levels in my categorical variables?

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Réponse

You can use the 'GROUPRARE' method. The 'preprocessRare' parameter, when set to True, groups rare levels at the start. The rarity is determined by 'rareThreshold' (a frequency count) or 'rareThresholdPercent' (a percentage of total observations). Levels falling below this threshold are combined into a single group.
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Other questions about catTrans
Which grouping techniques are considered supervised and what do they require? What are the different methods available for categorical variable transformation in the catTrans action? How can I handle rare levels of a categorical variable using this action? What is the purpose of the catTrans action? What are the different methods available in the catTrans action?
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