data_mining:xgboost

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data_mining:xgboost [2019/05/03 01:13] – [Taylor expansion] phreazerdata_mining:xgboost [2020/08/02 16:11] phreazer
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 ===== Gradient boosting ===== ===== Gradient boosting =====
  
-$F$ is space of functions containing all regression trees +  * $F$ is space of functions containing all regression trees 
-$K$ is number of trees +  $K$ is number of trees 
-$f_k(x_i)$ is regression tree that maps a attribute to a score+  $f_k(x_i)$ is regression tree that maps a attribute to a score
  
 Learn functions (trees) instead of weights in $R^d$. Learn functions (trees) instead of weights in $R^d$.
  • data_mining/xgboost.txt
  • Last modified: 2020/08/02 16:12
  • by phreazer