petsc-master 2014-12-27
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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