jvx.numeric

Class PnBiconjugateGradient

java.lang.Object

jvx.numeric.PnConjugateGradientMatrix

jvx.numeric.PnBiconjugateGradient

public class PnBiconjugateGradient
extends PnConjugateGradientMatrix

Solve sparse linear equation systems using preconditioned biconjugate gradient method.

Author:

Klaus Hildebrandt.

Version:

20.06.06, 2.01 revised (kp) Deprecated method linbcg() removed.
02.12.05, 2.00 revised (jh) Now extends PnConjugateGradientMatrix.
11.03.03, 1.00 created (kh)

Constructor Summary

Constructors

Constructor and Description
PnBiconjugateGradient() Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	getUseStabilized() Returns whether the stabilized biconjugate gradient method is used or not.
double	linbcg(PnSparseMatrix smat, PdVector x, PdVector b) Deprecated. since JavaView 3.96.023, use method #solve() with same signature instead.
void	setUseStabilized(boolean stab) If set true to use the stabilized biconjugate gradient method.
double	solve(PnSparseMatrix smat, PdVector x, PdVector b) Method solves a sparse linear equation system A*x=b.

Methods inherited from class jvx.numeric.PnConjugateGradientMatrix

converged, getActualEstimatedError, getActualNumOfTakenIterations, getConvergenceTest, getDimension, getMaxNumIterations, getPreconditioner, getTolerance, setConvergenceTest, setDimension, setMaxNumIterations, setPreconditioner, setTolerance, updatePreconditioner

Methods inherited from class java.lang.Object

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

Constructor Detail

PnBiconjugateGradient

public PnBiconjugateGradient()

Constructor.

Method Detail

setUseStabilized

public void setUseStabilized(boolean stab)

If set true to use the stabilized biconjugate gradient method.

Parameters:

stab -

getUseStabilized

public boolean getUseStabilized()

Returns whether the stabilized biconjugate gradient method is used or not.

solve

public double solve(PnSparseMatrix smat,
                    PdVector x,
                    PdVector b)

Method solves a sparse linear equation system A*x=b. Set the preconditioner to use with @see setPreconditioner( PnPreconditioner prec ) By default the stabilized biconjugate gradient method is used, you can force the regular biconjugate gradient method with setUseStabilized(false). The matrix has to be square.

Overrides:

solve in class PnConjugateGradientMatrix

Returns:

estimated error of solution or -1 at error.

linbcg

public double linbcg(PnSparseMatrix smat,
                     PdVector x,
                     PdVector b)

Deprecated. since JavaView 3.96.023, use method #solve() with same signature instead.

Method solves a sparse linear equation system A*x=b using a preconditioned biconjugate gradient method.

Returns:

estimated error of solution or -1 at error.