petscmain 20210420
MatCreateBlockMat
Creates a new matrix in which each block contains a uniformsize sequential Mat object
Synopsis
#include "petscmat.h"
PetscErrorCode MatCreateBlockMat(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt bs,PetscInt nz,PetscInt *nnz, Mat *A)
Collective
Input Parameters
 comm   MPI communicator

 m   number of rows

 n   number of columns

 bs   size of each submatrix

 nz   expected maximum number of nonzero blocks in row (use PETSC_DEFAULT if not known)

 nnz   expected number of nonzers per block row if known (use NULL otherwise)

Output Parameter
Notes
Matrices of this type are nominallysparse matrices in which each "entry" is a Mat object. Each Mat must
have the same size and be sequential. The local and global sizes must be compatible with this decomposition.
For matrices containing parallel submatrices and variable block sizes, see MATNEST.
See Also
MATBLOCKMAT, MatCreateNest()
Level
intermediate
Location
src/mat/impls/blockmat/seq/blockmat.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages