[petsc-users] Vector layout in PetscBinaryRead.m

[zakaryah]

Thanks Matt.  I have had problems getting HDF5 to work when I run my solver
in parallel.  Can you link me to an example which writes a vector as HDF5
that will work in parallel?  To be clear - I don't care if the I/O is in
serial, I just need the VecView to not crash with multiple processors.

On Wed, May 1, 2019 at 5:51 PM Matthew Knepley <knepley at gmail.com> wrote:

> On Wed, May 1, 2019 at 5:44 PM zakaryah via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
>> I'm using PETSc to solve some equations, outputting the results using
>> PetscViewerBinaryOpen and VecView, then loading the vector files into
>> Matlab using PetscBinaryRead.m.  The vectors are global vectors created
>> from a 3D DMDA.  Is there a way to extract the layout from the binary file,
>> so that I can visualize the vectors on a 3D grid?
>>
>
> No, we do not preserve that information in the PETSc binary format. We
> have richer output that does, like HDF5.
>
>   Thanks,
>
>     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
>
> https://www.cse.buffalo.edu/~knepley/
> <http://www.cse.buffalo.edu/~knepley/>
>
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