PETSc version 3.17.5
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MatCreateBlockMat

Creates a new matrix in which each block contains a uniform-size 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

A - the matrix

Notes

Matrices of this type are nominally-sparse 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
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Index of all manual pages