ml.dmlc.xgboost4j.java.util

Class BigDenseMatrix

java.lang.Object

ml.dmlc.xgboost4j.java.util.BigDenseMatrix

public final class BigDenseMatrix
extends Object

Off-heap implementation of a Dense Matrix, matrix size is only limited by the amount of the available memory and the matrix dimension cannot exceed Integer.MAX_VALUE (this is consistent with XGBoost API restrictions on maximum length of a response).

Field Summary

Fields

Modifier and Type	Field and Description
long	address
static long	MAX_MATRIX_SIZE
int	ncol
int	nrow

Constructor Summary

Constructors

Constructor and Description
BigDenseMatrix(int nrow, int ncol)

Method Summary

Modifier and Type	Method and Description
void	dispose()
float	get(int idx)
float	get(int i, int j)
void	set(int idx, float val)
void	set(int i, int j, float val)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_MATRIX_SIZE

public static final long MAX_MATRIX_SIZE

See Also:

Constant Field Values

nrow

public final int nrow

ncol

public final int ncol

address

public final long address

Constructor Detail

BigDenseMatrix

public BigDenseMatrix(int nrow,
                      int ncol)

Method Detail

set

public final void set(int idx,
                      float val)

set

public final void set(int i,
                      int j,
                      float val)

get

public final float get(int idx)

get

public final float get(int i,
                       int j)

dispose

public final void dispose()