Cast matrix as a vector?

[liu chang]

Thanks Matt.

> 2) If you are worried about memory, PETSc Vec and dense
>      matrix can have the same layout and share a pointer.

That's the ideal solution but how can I do that? I can't find a way to
create a Mat or Vec from an existing pointer.

Regards,
Liu Chang

> On Sun, May 3, 2009 at 4:42 AM, liu chang <liuchangjohn at gmail.com> wrote:
>>
>> I'm using TAO's LMVM method for optimize a dense matrix, but TAO
>> expects its input as a Vec. Do I have to copy the content back and
>> forth between a Mat and a Vec? Can I somehow cast the Mat into a Vec?
>>
>> Both the Mat and the Vec are distributed evenly across the processes
>> so ideally there doesn't need to be any copying at all.
>>
>> Thanks,
>> Liu Chang
>
>
>
> --
> 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
>