#include "petscmat.h"
PetscErrorCode MatCreateMPIAIJWithSplitArrays(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscInt i[],PetscInt j[],PetscScalar a[],
PetscInt oi[], PetscInt oj[],PetscScalar oa[],Mat *mat)
Collective on MPI_Comm
| comm | - MPI communicator | |
| m | - number of local rows (Cannot be PETSC_DECIDE) | |
| n | - This value should be the same as the local size used in creating the x vector for the matrix-vector product y = Ax. (or PETSC_DECIDE to have calculated if N is given) For square matrices n is almost always m. | |
| M | - number of global rows (or PETSC_DETERMINE to have calculated if m is given) | |
| N | - number of global columns (or PETSC_DETERMINE to have calculated if n is given) | |
| i | - row indices for "diagonal" portion of matrix | |
| j | - column indices | |
| a | - matrix values | |
| oi | - row indices for "off-diagonal" portion of matrix | |
| oj | - column indices | |
| oa | - matrix values |
The i and j indices are 0 based
See MatCreateMPIAIJ() for the definition of "diagonal" and "off-diagonal" portion of the matrix
This sets local rows and cannot be used to set off-processor values.
You cannot later use MatSetValues() to change values in this matrix.
Level:advanced
Location:src/mat/impls/aij/mpi/mpiaij.c
Index of all Mat routines
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