[petsc-users] Question about MatGetRow

[Mark Adams]

https://petsc.org/main/docs/manualpages/Mat/MatCreateSubMatrix/

Note, PETSc lets you give NULL arguments if there is a reasonable default.
In this case give NULL for the column IS and you will get the whole columns.

Mark

On Fri, Feb 3, 2023 at 4:05 AM 김성익 <ksi2443 at gmail.com> wrote:

> Hello,
>
>
> By using MatGetRow, user can get vectors from local matrix (at each
> process).
>
> However, I need other process's row values.
> So I have 2 questions.
>
> 1. Is there any function for getting arrays from other process's??
>
> 2. Or is there any function like matrix version of vecscattertoall??
>
> Thanks,
> Hyung Kim
>
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