[petsc-users] Petsc HDF5. Storing matrices and adding attributes

[Matthew Knepley]

On Sun, Sep 8, 2013 at 11:34 AM, Analabha Roy <hariseldon99 at gmail.com>wrote:

>
> On Sep 8, 2013 8:39 PM, "Barry Smith" <bsmith at mcs.anl.gov> wrote:
> >
> >
> > On Sep 8, 2013, at 10:00 AM, Analabha Roy <hariseldon99 at gmail.com>
> wrote:
> >
> > > Hi all,
> > >
> > > Firstly:
> > > I need to store a matrix in HDF5. I was reading through petsc manual
> pages and examples and only saw information for storing vectors in HDF5.
> Using MatView() on a HDF5 viewer doesn't work. Is it even possible?
> > >
> >    Is your matrix dense?  If your matrix is sparse why do you even want
> to store it? and if you do want to store it why do you want to use HDF5 (it
> won't be any faster than just using the PETSc binary format).
>
> It's sparse, but will binary output be cross platform portable?
>
Yes.

    Matt

>  >    Generally people store vectors in HDF5 because they have some other
> tool (like a visualization package) that can read HDF5 easily. Don't think
> that exists for sparse matrices.
> >
>
> >    Barry
> >
> >
> >
> > > For now, I'm working around by extracting the columns from my Mat and
> storing them as vecs by looping  VecView().
> > >
> > >
> > > Secondly:
> > > Is there a way to add attributes to HDF5 data using the PetSc API? I
> didn't see any docs on this.
> > >
> > >
> > >
> > > Thanks in advance,
> > > AR
> > >
> > > --
> > > ---
> > > Analabha Roy
> > > C.S.I.R  Senior Research Associate
> > > Saha Institute of Nuclear Physics
> > > Section 1, Block AF
> > > Bidhannagar, Calcutta 700064
> > > India
> > > Emails: daneel at physics.utexas.edu, hariseldon99 at gmail.com
> > > Webpage: http://www.ph.utexas.edu/~daneel/
> >
>



-- 
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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