jvx.numeric

Class PnPreconditionerILU

java.lang.Object

jvx.numeric.PnPreconditioner

jvx.numeric.PnPreconditionerILU

public class PnPreconditionerILU
extends PnPreconditioner

Perform an ILU Preconditioning.

Author:

Jonas Hurrelmann

Version:

02.12.05, 1.00 created (jh)

Field Summary

Fields inherited from class jvx.numeric.PnPreconditioner

m_smat

Constructor Summary

Constructors

Constructor and Description
PnPreconditionerILU(PnSparseMatrix A)
PnPreconditionerILU(PnSparseMatrix A, double initShift)

Method Summary

Modifier and Type	Method and Description
PdVector	apply(PdVector b, PdVector x, int dim) Apply the preconditioner to a given vector b storing the result in x using given dimension of vectors This method has to be implemented
PdVector	applyTransposed(PdVector b, PdVector x, int dim) Apply the preconditioner transposed to a given vector b storing the result in x This method has to be implemented
void	setSparseMatrix(PnSparseMatrix A) Set the matrix to use in the preconditionert.
void	updateDiag() Update the index of diagonal elements of the matrix

Methods inherited from class jvx.numeric.PnPreconditioner

apply, applyTransposed

Methods inherited from class java.lang.Object

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

Constructor Detail

PnPreconditionerILU

public PnPreconditionerILU(PnSparseMatrix A)

PnPreconditionerILU

public PnPreconditionerILU(PnSparseMatrix A,
                           double initShift)

Method Detail

setSparseMatrix

public void setSparseMatrix(PnSparseMatrix A)

Description copied from class: PnPreconditioner

Set the matrix to use in the preconditionert. The matrix has to be square.

This method has to be implemented

Overrides:

setSparseMatrix in class PnPreconditioner

apply

public PdVector apply(PdVector b,
                      PdVector x,
                      int dim)

Description copied from class: PnPreconditioner

Apply the preconditioner to a given vector b storing the result in x using given dimension of vectors

This method has to be implemented

Overrides:

apply in class PnPreconditioner

Returns:

x

applyTransposed

public PdVector applyTransposed(PdVector b,
                                PdVector x,
                                int dim)

Description copied from class: PnPreconditioner

Apply the preconditioner transposed to a given vector b storing the result in x

This method has to be implemented

Overrides:

applyTransposed in class PnPreconditioner

Returns:

x

updateDiag

public void updateDiag()

Update the index of diagonal elements of the matrix