Tree updater for single-target trees. More...

Public Member Functions
	HistUpdater (Context const ctx, std::shared_ptr< common::ColumnSampler > column_sampler, TrainParam const param, HistMakerTrainParam const hist_param, DMatrix const fmat, ObjInfo const task, common::Monitor monitor)

bool	UpdatePredictionCache (DMatrix const *data, linalg::MatrixView< float > out_preds) const

void	InitData (DMatrix fmat, RegTree const p_tree)

void	EvaluateSplits (DMatrix p_fmat, RegTree const p_tree, std::vector< CPUExpandEntry > *best_splits)

void	ApplyTreeSplit (CPUExpandEntry const &candidate, RegTree *p_tree)

CPUExpandEntry	InitRoot (DMatrix p_fmat, linalg::MatrixView< GradientPair const > gpair, RegTree p_tree)

void	BuildHistogram (DMatrix p_fmat, RegTree p_tree, std::vector< CPUExpandEntry > const &valid_candidates, linalg::MatrixView< GradientPair const > gpair)

void	UpdatePosition (DMatrix p_fmat, RegTree const p_tree, std::vector< CPUExpandEntry > const &applied)

void	LeafPartition (RegTree const &tree, linalg::MatrixView< GradientPair const > gpair, std::vector< bst_node_t > *p_out_position)

Detailed Description

Tree updater for single-target trees.

Member Function Documentation

CPUExpandEntry xgboost::tree::HistUpdater::InitRoot	(	DMatrix *	p_fmat,
		linalg::MatrixView< GradientPair const >	gpair,
		RegTree *	p_tree
	)

inline

Specialized code for dense data: For dense data (with no missing value), the sum of gradient histogram is equal to snode[nid]

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