#include "petscmat.h" PetscErrorCode MatCreateSeqSBAIJWithArrays(MPI_Comm comm,PetscInt bs,PetscInt m,PetscInt n,PetscInt i,PetscInt j,PetscScalar a,Mat *mat)Collective on MPI_Comm
|comm||- must be an MPI communicator of size 1|
|bs||- size of block|
|m||- number of rows|
|n||- number of columns|
|i||- row indices; that is i = 0, i[row] = i[row-1] + number of block elements in that row block row of the matrix|
|j||- column indices|
|a||- matrix values|
You cannot set new nonzero locations into this matrix, that will generate an error.
The i and j indices are 0 based
When block size is greater than 1 the matrix values must be stored using the SBAIJ storage format (see the SBAIJ code to determine this). For block size of 1 it is the regular CSR format excluding the lower triangular elements.