Utility for fast column-wise access. More...

#include <limits>
#include <vector>
#include <memory>
#include "hist_util.h"

Include dependency graph for column_matrix.h:

Classes
class	xgboost::common::Column< BinIdxType >
	a column storage, to be used with ApplySplit. Note that each bin id is stored as index[i] + index_base. Different types of column index for each column allow to reduce the memory usage. More...

class	xgboost::common::SparseColumn< BinIdxType >

class	xgboost::common::DenseColumn< BinIdxType >

class	xgboost::common::ColumnMatrix
	a collection of columns, with support for construction from GHistIndexMatrix. More...

Enumerations
enum	xgboost::common::ColumnType { xgboost::common::kDenseColumn, xgboost::common::kSparseColumn }
	column type More...

Detailed Description

Utility for fast column-wise access.

Classes