[petsc-users] About finding the eigenvalues of of large sparse matrices using SLEPc package

[Matthew Knepley]

On Sat, May 25, 2019 at 11:10 AM Afrah Najib via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi,
>
> I want to use SLEPc to find the eigenvlaues of matrices from FLorida
> sparse matrix collection (https://sparse.tamu.edu/). The available matrix
> formats  are mtx, matlab and Rutherford Boeing.
>
> I installed the slepc-3.11.1 successfully with petsc-lite-3.11.2 as a
> dependency
> How can I use the examples of this library with such matrix formats,
>

You can use
https://bitbucket.org/petsc/petsc/src/master/src/mat/examples/tests/ex72.c
to read it in
and then write it as a PETSc binary.

  Thanks,

     Matt


> Many thanks for any kind of help,
>


-- 
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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