[petsc-users] Store only Matrix Structure (Binary)

[Matthew Knepley]

On Tue, Jul 17, 2012 at 12:31 PM, Thomas Hisch <t.hisch at gmail.com> wrote:

> On Mon, Jul 16, 2012 at 11:44 PM, Matthew Knepley <knepley at gmail.com>
> wrote:
> > On Mon, Jul 16, 2012 at 3:47 PM, Thomas Hisch <t.hisch at gmail.com> wrote:
> >>
> >> Hello list,
> >>
> >> is it possible to store just the nonzero pattern of a large (sparse)
> >> matrix in a file? If I write the whole matrix to disk
> >> (PetscViewerBinaryOpen/MatView) its size is about 30MB. As I only need
> >> its structure it would be a good idea to load and store just the
> >> non-zero pattern of the matrix.
> >>
> >> Has anyone tried to do that and are there corresponding functions in
> >> petsc-dev?
> >
> >
> > This is not in PETSc currrently. It would not be hard to do by commenting
> > out the
> > value parts in the source.
>
> In which file do I have to look at ?


http://petsc.cs.iit.edu/petsc/petsc-dev/annotate/96539c3bad2e/src/mat/impls/aij/mpi/mpiaij.c#l1290

   Matt


>
> Thomas
>



-- 
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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