[petsc-users] RAW binary write

[Matthew Knepley]

On Thu, Nov 29, 2018 at 10:50 AM Sal Am via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Is there a way to write the solution from the system Ax=b in raw binary
> instead of PETSc binary format?
>

What is "raw binary". You have to have some format.

   Matt


> Currently I am doing:
>   ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,
> "../../python/petscpy/Vector_x_petsc.dat", FILE_MODE_WRITE,
> &viewer);CHKERRQ(ierr);
>   ierr = VecView(x,viewer);CHKERRQ(ierr);CHKERRQ(ierr);
>   ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr);
>
> And then use PetscBinaryIO to read it back and save it using
> write('newformat', 'wb') to get to raw... however this approach is not good
> it seems as there are some troubles with little/big endian when using the
> resulting converted file on other systems for post-processing.
>
> Thanks,
>


-- 
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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