Xgboost Regression, Xgboost, Regression, Boosting, Ensemble Method.
+ Similarity Weight of Right Node - Similarity Weight of Root Node = 50 + 21.3 - 81 = -9.7 // So the total gain we will get from this split is -9.7 Suppose this is the overall tree structure that we have created for the first tree. How will we calculate the output? It will be the average of leaf