[petsc-dev] I do not think this is the right solution

[Jed Brown]

On Sun, Mar 18, 2012 at 18:55, Matthew Knepley <knepley at gmail.com> wrote:

> No off-diagonal.


So I think the MatGetArray() should be MatDenseGetArray() because it's not
directly useful otherwise.

For in-place modification (if that is actually useful), I'd do it with a
callback.

Note that for your specific purpose, you can do in-place modification with
MatMPIAIJGetAIJ() and MatGetArray() on each off-diagonal block.
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