org.ejml.alg.dense.linsol.lu

Class LinearSolverLuKJI

java.lang.Object

org.ejml.alg.dense.linsol.LinearSolverAbstract

org.ejml.alg.dense.linsol.lu.LinearSolverLuBase

org.ejml.alg.dense.linsol.lu.LinearSolverLuKJI

All Implemented Interfaces:

LinearSolver<DenseMatrix64F>

public class LinearSolverLuKJI
extends LinearSolverLuBase

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 in this approach and b and x can't be the same instance, which means it has slightly less functionality.

Author:

Peter Abeles

Field Summary

Fields inherited from class org.ejml.alg.dense.linsol.lu.LinearSolverLuBase

decomp

Fields inherited from class org.ejml.alg.dense.linsol.LinearSolverAbstract

A, numCols, numRows

Constructor Summary

Constructors

Constructor and Description
LinearSolverLuKJI(LUDecompositionBase decomp)

Method Summary

Methods

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

improveSol, invert, modifiesA, modifiesB, quality

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

_setA, getA

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearSolverLuKJI

public LinearSolverLuKJI(LUDecompositionBase 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

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.