petsc-3.7.5 2017-01-01
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 -coumn 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