petsc-3.4.2 2013-07-02

# MatSetBlockSizes

Sets the matrix block row and column sizes.

### Synopsis

    #include "petscmat.h"
    PetscErrorCode  MatSetBlockSizes(Mat mat,PetscInt rbs,PetscInt cbs)

Logically Collective on Mat

### Input Parameters

| mat | - the matrix
| rbs | - row block size

cbs -column block size

### Notes

This must be called before MatSetUp() or MatXXXSetPreallocation() (or will default to 1) and the block size cannot be changed later

### See Also

MatCreateSeqBAIJ(), MatCreateBAIJ(), MatGetBlockSize()

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