how to get the MPIAIJ matrix information?

[Satish Balay]

MatAIJ is either MatSeqAIJ or MatMPIAIJ [depeding upon no of procs in
the run].

So if you already have MatAIJ [which mostlikely is MatMPIAIJ for you]
- why do you need to recreate it as MatMPIAIJ?

Satish

On Fri, 13 Feb 2009, Yujie wrote:

> Hi,
> 
> In MatCreateMPIAIJ() function, it needs d_nz, d_nnz[], o_nz, o_nnz[]. If one
> has a MATAIJ matrix, how to obtian this information? thanks a lot.
> 
> PetscErrorCode PETSCMAT_DLLEXPORT MatCreateMPIAIJ(MPI_Comm comm,PetscInt
> m,PetscInt n,PetscInt M,PetscInt N,PetscInt d_nz,const PetscInt
> d_nnz[],PetscInt o_nz,const PetscInt o_nnz[],Mat *A)
> 
> Regards,
> 
> Yujie
>