EpetraExt Development
Public Member Functions | Static Public Member Functions
EpetraExt::MatrixMatrix Class Reference

Collection of matrix-matrix operations. More...

#include <EpetraExt_MatrixMatrix.h>

List of all members.

Public Member Functions

virtual ~MatrixMatrix ()
 destructor

Static Public Member Functions

static int Multiply (const Epetra_CrsMatrix &A, bool transposeA, const Epetra_CrsMatrix &B, bool transposeB, Epetra_CrsMatrix &C, bool call_FillComplete_on_result=true)
 Given Epetra_CrsMatrix objects A, B and C, form the product C = A*B.
static int Add (const Epetra_CrsMatrix &A, bool transposeA, double scalarA, Epetra_CrsMatrix &B, double scalarB)
 Given Epetra_CrsMatrix objects A and B, form the sum B = a*A + b*B.
static int Add (const Epetra_CrsMatrix &A, bool transposeA, double scalarA, const Epetra_CrsMatrix &B, bool transposeB, double scalarB, Epetra_CrsMatrix *&C)
 Given Epetra_CrsMatrix objects A and B, form the sum C = a*A + b*B.

Detailed Description

Collection of matrix-matrix operations.

This class basically functions as a namespace, containing only static methods. See the program epetraext/test/MatrixMatrix/cxx_main.cpp for a usage example.

Definition at line 55 of file EpetraExt_MatrixMatrix.h.


Constructor & Destructor Documentation

virtual EpetraExt::MatrixMatrix::~MatrixMatrix ( ) [inline, virtual]

destructor

Definition at line 59 of file EpetraExt_MatrixMatrix.h.


Member Function Documentation

int EpetraExt::MatrixMatrix::Multiply ( const Epetra_CrsMatrix A,
bool  transposeA,
const Epetra_CrsMatrix B,
bool  transposeB,
Epetra_CrsMatrix C,
bool  call_FillComplete_on_result = true 
) [static]

Given Epetra_CrsMatrix objects A, B and C, form the product C = A*B.

In a parallel setting, A and B need not have matching distributions, but C needs to have the same row-map as A.

Parameters:
AInput, must already have had 'FillComplete()' called.
transposeAInput, whether to use transpose of matrix A.
BInput, must already have had 'FillComplete()' called.
transposeBInput, whether to use transpose of matrix B.
CResult. On entry to this method, it doesn't matter whether FillComplete() has already been called on C or not. If it has, then C's graph must already contain all nonzero locations that will be produced when forming the product A*B. On exit, C.FillComplete() will have been called, unless the last argument to this function is specified to be false.
call_FillComplete_on_resultOptional argument, defaults to true. Power users may specify this argument to be false if they *DON'T* want this function to call C.FillComplete. (It is often useful to allow this function to call C.FillComplete, in cases where one or both of the input matrices are rectangular and it is not trivial to know which maps to use for the domain- and range-maps.)
Returns:
error-code, 0 if successful. non-zero returns may result if A or B are not already Filled, or if errors occur in putting values into C, etc.

Definition at line 1062 of file EpetraExt_MatrixMatrix.cpp.

int EpetraExt::MatrixMatrix::Add ( const Epetra_CrsMatrix A,
bool  transposeA,
double  scalarA,
Epetra_CrsMatrix B,
double  scalarB 
) [static]

Given Epetra_CrsMatrix objects A and B, form the sum B = a*A + b*B.

Parameters:
AInput, must already have had 'FillComplete()' called.
transposeAInput, whether to use transpose of matrix A.
scalarAInput, scalar multiplier for matrix A.
BResult. On entry to this method, it doesn't matter whether FillComplete() has already been called on B or not. If it has, then B's graph must already contain all nonzero locations that will be produced when forming the sum.
scalarBInput, scalar multiplier for matrix B.
Returns:
error-code, 0 if successful. non-zero returns may result if A is not already Filled, or if errors occur in putting values into B, etc.

Definition at line 1232 of file EpetraExt_MatrixMatrix.cpp.

int EpetraExt::MatrixMatrix::Add ( const Epetra_CrsMatrix A,
bool  transposeA,
double  scalarA,
const Epetra_CrsMatrix B,
bool  transposeB,
double  scalarB,
Epetra_CrsMatrix *&  C 
) [static]

Given Epetra_CrsMatrix objects A and B, form the sum C = a*A + b*B.

Parameters:
AInput, must already have had 'FillComplete()' called.
transposeAInput, whether to use transpose of matrix A.
scalarAInput, scalar multiplier for matrix A.
BInput, must already have had 'FillComplete()' called.
transposeBInput, whether to use transpose of matrix B.
scalarBInput, scalar multiplier for matrix B.
CResult. On entry to this method, C can be NULL or a pointer to an unfilled or filled matrix. If C is NULL then a new object is allocated and must be deleted by the user. If C is not NULL and FillComplete has already been called then the sparsity pattern is assumed to be fixed and compatible with the sparsity of A+B. If FillComplete has not been called then the sum is completed and the function returns without calling FillComplete on C.
Returns:
error-code, 0 if successful. non-zero returns may result if A or is not already Filled, or if errors occur in putting values into C, etc.

Definition at line 1324 of file EpetraExt_MatrixMatrix.cpp.


The documentation for this class was generated from the following files:
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines