Package 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	Description
final long	address
static final long	MAX_MATRIX_SIZE
final int	ncol
final int	nrow

Constructor Summary

Constructors

Constructor	Description
BigDenseMatrix(int nrow, int ncol)

Method Summary

Modifier and Type	Method	Description
final void	dispose()
final float	get(int i, int j)
final float	get(long idx)
static float	getDirect(long valAddress)
final void	set(int i, int j, float val)
final void	set(long idx, float val)
static void	setDirect(long valAddress, float val)

Methods inherited from class java.lang.Object

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

Field Details

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 Details

BigDenseMatrix

public BigDenseMatrix(int nrow,
 int ncol)

Method Details

setDirect

public static void setDirect(long valAddress,
 float val)

getDirect

public static float getDirect(long valAddress)

set

public final void set(long idx,
 float val)

set

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

get

public final float get(long idx)

get

public final float get(int i,
 int j)

dispose

public final void dispose()