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Emerging Topics Community: The Hashing Trick for High Cardinality Features (Part 3 of 4)
SOA Podcasts - Society of Actuaries
English - February 21, 2023 19:48 - 19 minutes - 18 MB - ★★★★★ - 25 ratingsCareers Business Education soa actuaries actuary society Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
This is the third in a 4-part series where Anders Larson and Shea Parkes discuss predictive analytics with high cardinality features. In this episode they focus on feature engineering via the hashing trick. The hashing trick is most applicable for extremely high cardinality, and at first glance can seem almost ridiculous. In a lot of ways, it is the same as bucketing values at random. But there are times that it is more valuable to include randomly engineered buckets than to exclude the original high cardinality feature entirely.