How are Variable Interactions Modeled in Decision Trees (CART)?
Prior to watching this video, it is strongly recommended that you first watch the video “How to Write a Decision Tree (CART) as an Equation” ( • How to Write a Decision Tree (CART) a... ).
CART automatically models variable interactions. Since CART is the foundation of Random Forests and Gradient Boosted Trees, both of these methods also automatically model variable interactions. In this video we discuss how CART models variable interactions locally by expressing CART as an equation.
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