Package org.apache.sysds.hops.estim

Class EstimationUtils

java.lang.Object

org.apache.sysds.hops.estim.EstimationUtils

public abstract class EstimationUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
EstimationUtils()

Method Summary

Modifier and Type	Method	Description
static long	getSelfProductOutputNnz(MatrixBlock m1)	This utility function computes the exact output nnz of a self matrix product without need to materialize the output.
static long	getSparseProductOutputNnz(MatrixBlock m1, MatrixBlock m2)

Methods inherited from class java.lang.Object

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

Constructor Detail

EstimationUtils

public EstimationUtils()

Method Detail

getSelfProductOutputNnz

public static long getSelfProductOutputNnz(MatrixBlock m1)

This utility function computes the exact output nnz of a self matrix product without need to materialize the output.

Parameters:

m1 - dense or sparse input matrix

Returns:

exact output number of non-zeros.

getSparseProductOutputNnz

public static long getSparseProductOutputNnz(MatrixBlock m1,
                                             MatrixBlock m2)