[petsc-users] Adding MatAij rows

[Matthew Knepley]

On Fri, May 7, 2010 at 3:57 PM, <irfan.khan at gatech.edu> wrote:

> Petsc Team,
>
> Is there a function that can be used to add two rows and put the results
> into a third row of the same parallel matrix (MPIAIJ)? i.e
>
> A[k][l] = A[i][l] + A[j][l]
>

No, since it would entail messing with the nonzero structure. You could
easily
use a second matrix to get this effect from subsequent MatMult() calls.

   Matt


> Thank you
> Irfan
>
> --
> PhD Candidate
> G.W. Woodruff School of Mechanical Engineering
> Georgia Institute of Technology
> Atlanta, GA (30332)
>



-- 
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
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