node statistics used in regression tree More...

#include <tree_model.h>

Public Member Functions
	RTreeNodeStat (float loss_chg, float sum_hess, float weight)

bool	operator== (const RTreeNodeStat &b) const

RTreeNodeStat	ByteSwap () const

Data Fields
bst_float	loss_chg
	loss change caused by current split

bst_float	sum_hess
	sum of hessian values, used to measure coverage of data

bst_float	base_weight
	weight of current node

int	leaf_child_cnt {0}
	number of child that is leaf node known up to now

Detailed Description

node statistics used in regression tree

The documentation for this struct was generated from the following file:

Public Member Functions