[petsc-users] DMNetworkGetEdgeRange() in parallel

[Matthew Knepley]

On Sun, Feb 22, 2015 at 3:59 PM, Miguel Angel Salazar de Troya <
salazardetroya at gmail.com> wrote:

> Thanks. Once I obtain that Index Set with the routine DMPlexCreateCellNumbering()
> (I assume that the edges in DMNetwork correspond to cells in DMPlex) can I
> use it to partition a vector with as many components as edges I have in my
> network?
>

I do not completely understand the question.

If you want a partition of the edges, you can use DMPlexCreatePartition()
and its friend DMPlexDistribute(). What
are you trying to do?

   Matt


> Thanks
> Miguel
>
> On Sun, Feb 22, 2015 at 12:15 PM, Matthew Knepley <knepley at gmail.com>
> wrote:
>
>> On Sun, Feb 22, 2015 at 11:01 AM, Miguel Angel Salazar de Troya <
>> salazardetroya at gmail.com> wrote:
>>
>>> Hi
>>>
>>> I noticed that the routine DMNetworkGetEdgeRange() returns the local
>>> indices for the edge range. Is there any way to obtain the global indices?
>>> So if my network has 10 edges, the processor 1 has the 0-4 edges and the
>>> processor 2, the 5-9 edges, how can I obtain this information?
>>>
>>
>> One of the points of DMPlex is we do not require a global numbering.
>> Everything is numbered
>> locally, and the PetscSF maps local numbers to local numbers in order to
>> determine ownership.
>>
>> If you want to create a global numbering for some reason, you can using
>> DMPlexCreatePointNumbering().
>> There are also cell and vertex versions that we use for output, so you
>> could do it just for edges as well.
>>
>>   Thanks,
>>
>>      Matt
>>
>>
>>> Thanks
>>> Miguel
>>>
>>> --
>>> *Miguel Angel Salazar de Troya*
>>> Graduate Research Assistant
>>> Department of Mechanical Science and Engineering
>>> University of Illinois at Urbana-Champaign
>>> (217) 550-2360
>>> salaza11 at illinois.edu
>>>
>>>
>>
>>
>> --
>> 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
>>
>
>
>
> --
> *Miguel Angel Salazar de Troya*
> Graduate Research Assistant
> Department of Mechanical Science and Engineering
> University of Illinois at Urbana-Champaign
> (217) 550-2360
> salaza11 at illinois.edu
>
>


-- 
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20150223/91be4abd/attachment.html>