Ifpack_DropFilter: Filter based on matrix entries. More...

#include <Ifpack_DropFilter.h>

Inheritance diagram for Ifpack_DropFilter:

Collaboration diagram for Ifpack_DropFilter:

Public Member Functions
	Ifpack_DropFilter (const Teuchos::RefCountPtr< Epetra_RowMatrix > &Matrix, double DropTol)
	Constructor.

virtual	~Ifpack_DropFilter ()
	Destructor.

virtual int	NumMyRowEntries (int MyRow, int &NumEntries) const
	Returns the number of entries in MyRow.

virtual int	MaxNumEntries () const
	Returns the maximum number of entries.

virtual int	ExtractMyRowCopy (int MyRow, int Length, int &NumEntries, double Values, int Indices) const

virtual int	ExtractDiagonalCopy (Epetra_Vector &Diagonal) const

virtual int	Multiply (bool TransA, const Epetra_MultiVector &X, Epetra_MultiVector &Y) const

virtual int	Solve (bool Upper, bool Trans, bool UnitDiagonal, const Epetra_MultiVector &X, Epetra_MultiVector &Y) const

virtual int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const

virtual int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const

virtual int	InvRowSums (Epetra_Vector &x) const

virtual int	LeftScale (const Epetra_Vector &x)

virtual int	InvColSums (Epetra_Vector &x) const

virtual int	RightScale (const Epetra_Vector &x)

virtual bool	Filled () const

virtual double	NormInf () const

virtual double	NormOne () const

virtual int	NumGlobalNonzeros () const

virtual int	NumGlobalRows () const

virtual int	NumGlobalCols () const

virtual int	NumGlobalDiagonals () const

virtual long long	NumGlobalNonzeros64 () const

virtual long long	NumGlobalRows64 () const

virtual long long	NumGlobalCols64 () const

virtual long long	NumGlobalDiagonals64 () const

virtual int	NumMyNonzeros () const

virtual int	NumMyRows () const

virtual int	NumMyCols () const

virtual int	NumMyDiagonals () const

virtual bool	LowerTriangular () const

virtual bool	UpperTriangular () const

virtual const Epetra_Map &	RowMatrixRowMap () const

virtual const Epetra_Map &	RowMatrixColMap () const

virtual const Epetra_Import *	RowMatrixImporter () const

int	SetUseTranspose (bool useTranspose)

bool	UseTranspose () const

bool	HasNormInf () const

const Epetra_Comm &	Comm () const

const Epetra_Map &	OperatorDomainMap () const

const Epetra_Map &	OperatorRangeMap () const

const Epetra_BlockMap &	Map () const

const char *	Label () const

Detailed Description

Ifpack_DropFilter: Filter based on matrix entries.

Ifpack_DropFilter enables the dropping of all elements whose absolute value is below a specified threshold.

A typical use is as follows:

Teuchos::RefCountPtr<Epetra_RowMatrix> A;
// first localize the matrix
Ifpack_LocalFilter LocalA(A);
// drop all elements below this value
double DropTol = 1e-5;
// now create the matrix, elements below DropTol are
// not included in calls to ExtractMyRowCopy(), Multiply()
// and Apply()
Ifpack_DropFilter DropA(LocalA,DropTol)

It is supposed that Ifpack_DropFilter is used on localized matrices.

Author: Marzio Sala, SNL 9214.

Last modified: Oct-04.

Definition at line 87 of file Ifpack_DropFilter.h.

The documentation for this class was generated from the following files:

Public Member Functions

Detailed Description