petsc-3.13.6 2020-09-29
MatGetBlockSizes
Returns the matrix block row and column sizes.
Synopsis
#include "petscmat.h"
PetscErrorCode MatGetBlockSizes(Mat mat,PetscInt *rbs, PetscInt *cbs)
Not Collective
Input Parameter
mat -the matrix
Output Parameter
| rbs | - row block size
|
| cbs | - column block size
|
Notes
Block row formats are MATSEQBAIJ, MATMPIBAIJ, MATSEQSBAIJ, MATMPISBAIJ. These formats ALWAYS have square block storage in the matrix.
If you pass a different block size for the columns than the rows, the row block size determines the square block storage.
If a block size has not been set yet this routine returns 1.
See Also
MatCreateSeqBAIJ(), MatCreateBAIJ(), MatGetBlockSize(), MatSetBlockSize(), MatSetBlockSizes()
Level
intermediate
Location
src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages