[petsc-users] Creating explicit matrix scatter

[Jed Brown]

MatGetSubMatrix() and later, MatGetRow()


On Sat, Dec 8, 2012 at 5:59 AM, Thomas Witkowski <
thomas.witkowski at tu-dresden.de> wrote:

> A have a distributed MATAIJ, which is non square. I want to create a new
> matrix, which has the same col layout but a different row layout and should
> be scattered from the original matrix. Thus, each rank should collect some
> rows, which may be non local in the original matrix, to its own local part
> of the new matrix. After creating the new matrix, I need not only to make
> some MatMult, but I need local access to the matrix rows. How to do this?
> Thanks for any advise.
>
> Thomas
>
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