hex.tree.xgboost

Class XGBoostUtils.SparseMatrix

java.lang.Object

hex.tree.xgboost.XGBoostUtils.SparseMatrix

Enclosing class:

XGBoostUtils

protected static final class XGBoostUtils.SparseMatrix
extends java.lang.Object

Sparse Matrix representation for XGBoost

Field Summary

Fields

Modifier and Type	Field and Description
protected int[][]	_colIndices
protected long[][]	_rowHeaders
protected float[][]	_sparseData

Constructor Summary

Constructors

Constructor and Description
SparseMatrix(float[][] sparseData, long[][] rowIndices, int[][] colIndices) Constructs a XGBoostUtils.SparseMatrix instance

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

_sparseData

protected final float[][] _sparseData

_rowHeaders

protected final long[][] _rowHeaders

_colIndices

protected final int[][] _colIndices

Constructor Detail

SparseMatrix

public SparseMatrix(float[][] sparseData,
                    long[][] rowIndices,
                    int[][] colIndices)

Constructs a XGBoostUtils.SparseMatrix instance

Parameters:

sparseData - Non-zero data of a sparse matrix

rowIndices - Indices to elements in sparseData rows begin with

colIndices - Column indices of elements in sparseData