[petsc-users] how to output components of a section

[leejearl]

Hi Sander:
     Thank you for your advices, and it works. But it is only available 
in th local vector.
Is there any methods to reach this purposes in the global vector?
     Thanks
leejearl
On 2016年11月05日 19:29, Sander Arens wrote:
> You can first obtain an IS with
> http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DM/DMCreateSubDM.html
> and with that you can obtain a subvector with
> http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Vec/VecGetSubVector.html
> which you can then view the usual way.
>
> Thanks,
> Sander
>
> On 5 November 2016 at 12:17, leejearl <leejearl at 126.com 
> <mailto:leejearl at 126.com>> wrote:
>
>     Hi, all:
>
>         I meet a problems which I can not overcome. The programe is
>     like the code in
>
>     "http://www.mcs.anl.gov/petsc/petsc-current/src/dm/impls/plex/examples/tutorials/ex1.c.html
>     <http://www.mcs.anl.gov/petsc/petsc-current/src/dm/impls/plex/examples/tutorials/ex1.c.html>".
>
>        The code create a section which has three fields: u,v,w. How
>     can I output the fields u and v without together with w?
>
>        Thanks!
>
>
>     leejearl
>
>
>
>

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