org.ejml.alg.dense.linsol.lu

Class LinearSolverLuKJI_D64

java.lang.Object

org.ejml.alg.dense.linsol.LinearSolverAbstract_D64

org.ejml.alg.dense.linsol.lu.LinearSolverLuBase_D64

org.ejml.alg.dense.linsol.lu.LinearSolverLuKJI_D64

All Implemented Interfaces:

LinearSolver<DenseMatrix64F>

public class LinearSolverLuKJI_D64
extends LinearSolverLuBase_D64

To avoid cpu cache issues the order in which the arrays are traversed have been changed. There seems to be no performance benit relative to LinearSolverLu_D64 in this approach and b and x can't be the same instance, which means it has slightly less functionality.

Constructor Summary

Constructors

Constructor and Description
LinearSolverLuKJI_D64(LUDecompositionBase_D64 decomp)

Method Summary

Modifier and Type	Method and Description
boolean	setA(DenseMatrix64F A) Specifies the A matrix in the linear equation.
void	solve(DenseMatrix64F b, DenseMatrix64F x) An other implementation of solve() that processes the matrices in a different order.

Methods inherited from class org.ejml.alg.dense.linsol.lu.LinearSolverLuBase_D64

getDecomposition, improveSol, invert, modifiesA, modifiesB, quality

Methods inherited from class org.ejml.alg.dense.linsol.LinearSolverAbstract_D64

getA

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearSolverLuKJI_D64

public LinearSolverLuKJI_D64(LUDecompositionBase_D64 decomp)

Method Detail

setA

public boolean setA(DenseMatrix64F A)

Description copied from interface: LinearSolver

Specifies the A matrix in the linear equation. A reference might be saved and it might also be modified depending on the implementation. If it is modified then LinearSolver.modifiesA() will return true.

If this value returns true that does not guarantee a valid solution was generated. This is because some decompositions don't detect singular matrices.

Specified by:

setA in interface LinearSolver<DenseMatrix64F>

Overrides:

setA in class LinearSolverLuBase_D64

Parameters:

A - The 'A' matrix in the linear equation. Might be modified or save the reference.

Returns:

true if it can be processed.

solve

public void solve(DenseMatrix64F b,
                  DenseMatrix64F x)

An other implementation of solve() that processes the matrices in a different order. It seems to have the same runtime performance as solve(org.ejml.data.DenseMatrix64F, org.ejml.data.DenseMatrix64F) and is more complicated. It is being kept around to avoid future replication of work.

Parameters:

b - A matrix that is n by m. Not modified.

x - An n by m matrix where the solution is writen to. Modified.