BlaSparseCheck.c File Reference

Check properties of sparse matrices. More...

#include <math.h>
#include "fasp.h"
#include "fasp_functs.h"

Go to the source code of this file.

Functions
INT	fasp_check_diagpos (const dCSRmat *A)
	Check positivity of diagonal entries of a CSR sparse matrix. More...
SHORT	fasp_check_diagzero (const dCSRmat *A)
	Check if a CSR sparse matrix has diagonal entries that are very close to zero. More...
INT	fasp_check_diagdom (const dCSRmat *A)
	Check whether a matrix is diagonally dominant. More...
INT	fasp_check_symm (const dCSRmat *A)
	Check symmetry of a sparse matrix of CSR format. More...
void	fasp_check_dCSRmat (const dCSRmat *A)
	Check whether an dCSRmat matrix is supported or not. More...
SHORT	fasp_check_iCSRmat (const iCSRmat *A)
	Check whether an iCSRmat matrix is valid or not. More...
void	fasp_check_ordering (dCSRmat *A)
	Check whether each row of A is in ascending order w.r.t. column indices. More...

Detailed Description

Check properties of sparse matrices.

Note

This file contains Level-1 (Bla) functions. It requires: AuxMemory.c, AuxMessage.c, AuxVector.c, and BlaSparseCSR.c

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Copyright (C) 2009–Present by the FASP team. All rights reserved.

Released under the terms of the GNU Lesser General Public License 3.0 or later.

Definition in file BlaSparseCheck.c.

Function Documentation

fasp_check_dCSRmat()

void fasp_check_dCSRmat

(

const dCSRmat *

A

)

Check whether an dCSRmat matrix is supported or not.

Parameters

A	Pointer to the matrix in dCSRmat format

Author

Chensong Zhang

Date

03/29/2009

Definition at line 281 of file BlaSparseCheck.c.

fasp_check_diagdom()

INT fasp_check_diagdom

(

const dCSRmat *

A

)

Check whether a matrix is diagonally dominant.

INT fasp_check_diagdom (const dCSRmat *A)

Parameters

A	Pointer to the dCSRmat matrix

Returns

Number of the rows which are not diagonally dominant

Note

The routine chechs whether the sparse matrix is diagonally dominant each row. It will print out the percentage of the rows which are diagonally dominant.

Author

Shuo Zhang

Date

03/29/2009

Definition at line 114 of file BlaSparseCheck.c.

fasp_check_diagpos()

INT fasp_check_diagpos

(

const dCSRmat *

A

)

Check positivity of diagonal entries of a CSR sparse matrix.

Parameters

A	Pointer to dCSRmat matrix

Returns

Number of negative diagonal entries

Author

Shuo Zhang

Date

03/29/2009

Definition at line 35 of file BlaSparseCheck.c.

fasp_check_diagzero()

SHORT fasp_check_diagzero

(

const dCSRmat *

A

)

Check if a CSR sparse matrix has diagonal entries that are very close to zero.

Parameters

A	pointer to the dCSRmat matrix

Returns

FASP_SUCCESS if no diagonal entry is close to zero, else ERROR

Author

Shuo Zhang

Date

03/29/2009

Definition at line 72 of file BlaSparseCheck.c.

fasp_check_iCSRmat()

SHORT fasp_check_iCSRmat

(

const iCSRmat *

A

)

Check whether an iCSRmat matrix is valid or not.

Parameters

A	Pointer to the matrix in iCSRmat format

Author

Shuo Zhang

Date

03/29/2009

Definition at line 318 of file BlaSparseCheck.c.

fasp_check_ordering()

void fasp_check_ordering

(

dCSRmat *

A

)

Check whether each row of A is in ascending order w.r.t. column indices.

Parameters

A	Pointer to the dCSRmat matrix

Author

Chensong Zhang

Date

02/26/2019

Definition at line 357 of file BlaSparseCheck.c.

fasp_check_symm()

INT fasp_check_symm

(

const dCSRmat *

A

)

Check symmetry of a sparse matrix of CSR format.

Parameters

A	Pointer to the dCSRmat matrix

Returns

1 and 2 if the structure of the matrix is not symmetric; 0 if the structure of the matrix is symmetric,

Note

Print the maximal relative difference between matrix and its transpose.

Author

Shuo Zhang

Date

03/29/2009

Definition at line 159 of file BlaSparseCheck.c.