[petsc-users] Create 2 matrix with the same OwnershipRanges

[Matthew Knepley]

On Tue, Jan 22, 2019 at 4:57 AM NENNIG Benoit via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi,
>
> I would like to create a matrix aij with the same OwnershipRanges as an
> other existing matrix with petsc4py. The two matrices have not the same non
> zeros patern.
>
> Any ideas ?
>

MatSetSizes() can be used to determine the parallel layout of a matrix. So
you could call MatGetLocalSize() on the first Mat,
and then MatSetSizes() on the copy.

  Thanks,

    Matt


>
> Regards,
>
> Benoit
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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