jvx.numeric

Class PnBandEigenSolver

java.lang.Object

jv.object.PsObject

jvx.numeric.PnBandEigenSolver

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsUpdateIf

public abstract class PnBandEigenSolver
extends PsObject

Eigensolver computing a band instead the full spectrum of a matrix.

See Also:

Serialized Form

Author:

Christoph von Tycowicz

Version:

08.09.2008, 1.00 created (cvt)

Field Summary

Fields

Modifier and Type	Field and Description
static int	DENSE fields determing type of matrix for that a band can be computed
static int	SPARSE

Fields inherited from class jv.object.PsObject

HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

Constructors

Constructor and Description
PnBandEigenSolver()

Method Summary

Modifier and Type	Method and Description
int	computeBand(PdVector values, PdVector[] vectors) Compute band of the spectrum.
int	getCount()
abstract int	getInputType() Either DENSE or SPARSE depending on the espected type of input.
abstract java.lang.Object	getMatrix()
double	getShift()
int	getStepsize()
boolean	isAscending()
abstract boolean	isAvailable() Whether solver is available or not.
boolean	isCheckResults()
void	setAscending(boolean ascending)
void	setCheckResults(boolean check)
void	setCount(int count)
abstract void	setMatrix(java.lang.Object matrix)
void	setShift(double shift)
void	setStepsize(int stepsize)

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, init, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, toString, update, updatePanels

Methods inherited from class java.lang.Object

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

Field Detail

DENSE

public static final int DENSE

fields determing type of matrix for that a band can be computed

See Also:

Constant Field Values

SPARSE

public static final int SPARSE

See Also:

Constant Field Values

Constructor Detail

PnBandEigenSolver

public PnBandEigenSolver()

Method Detail

isAvailable

public abstract boolean isAvailable()

Whether solver is available or not.

getInputType

public abstract int getInputType()

Either DENSE or SPARSE depending on the espected type of input.

setMatrix

public abstract void setMatrix(java.lang.Object matrix)

Parameters:

matrix - PdMatrix if getInputType() is DENSE or PnSparseMatrix if it is SPARSE.

getMatrix

public abstract java.lang.Object getMatrix()

Returns:

matrix

computeBand

public int computeBand(PdVector values,
                       PdVector[] vectors)

Compute band of the spectrum.

Parameters:

values - Elements will be found eigenvalues.

vectors - Will contain found eigenvectors.

Returns:

Number of found eigenpairs.

getStepsize

public int getStepsize()

Returns:

Number of eigenparis computed per step.

setStepsize

public void setStepsize(int stepsize)

Parameters:

stepsize - Number of eigenparis computed per step (if too high lanczos-vectors will lose orthogonality).

getShift

public double getShift()

Returns:

Initial shift for computation.

setShift

public void setShift(double shift)

Parameters:

shift - Initial shift for computation.

isAscending

public boolean isAscending()

Returns:

Weather eigenvalues greater or smaller than shift are searched.

setAscending

public void setAscending(boolean ascending)

Parameters:

ascending - Flag weather eigenvalues greater or smaller than shift are searched.

getCount

public int getCount()

Returns:

Number of searched eigenvalues.

setCount

public void setCount(int count)

Parameters:

count - Number of searched eigenvalues.

setCheckResults

public void setCheckResults(boolean check)

Parameters:

check - Flag whether quality of computed eigenvalues/-vectors is checked.

isCheckResults

public boolean isCheckResults()

Returns:

Flag whether quality of computed eigenvalues/-vectors is checked.