org.apache.sysml.runtime.compress.utils

Class LinearAlgebraUtils

java.lang.Object

org.apache.sysml.runtime.compress.utils.LinearAlgebraUtils

public class LinearAlgebraUtils
extends Object

Various low-level primitives for compressed matrix blocks, some of which were copied from LibMatrixMult.

Constructor Summary

Constructors

Constructor and Description
LinearAlgebraUtils()

Method Summary

Modifier and Type	Method and Description
static void	copyNonZerosToRowCol(MatrixBlock ret, MatrixBlock tmp, int ix)
static void	vectAdd(double aval, double[] c, char[] bix, int bi, int ci, int len)
static void	vectAdd(double aval, double[] c, int ci, int len)
static double	vectSum(double[] a, char[] bix, int ai, int bi, int len)
static double	vectSum(double[] a, int ai, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearAlgebraUtils

public LinearAlgebraUtils()

Method Detail

vectAdd

public static void vectAdd(double aval,
                           double[] c,
                           char[] bix,
                           int bi,
                           int ci,
                           int len)

vectAdd

public static void vectAdd(double aval,
                           double[] c,
                           int ci,
                           int len)

vectSum

public static double vectSum(double[] a,
                             char[] bix,
                             int ai,
                             int bi,
                             int len)

vectSum

public static double vectSum(double[] a,
                             int ai,
                             int len)

copyNonZerosToRowCol

public static void copyNonZerosToRowCol(MatrixBlock ret,
                                        MatrixBlock tmp,
                                        int ix)