[petsc-users] Scale the diagonal entries of a Mat

[Matthew Knepley]

On Sat, Feb 23, 2013 at 7:29 AM, Hui Zhang <mike.hui.zhang at hotmail.com>wrote:

> I want to implement diagonal penalty method for enforcing the Dirichlet
> boundary conditions.  That is, the diagonal entries corresponding to
> Dirichlet boundary are going to be scaled by a large number.
>
> What is the easiest way to do this?  Thanks!


http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatDiagonalScale.html

  Matt

-- 
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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