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

[Barry Smith]

> On Nov 5, 2016, at 8:36 PM, leejearl <leejearl at 126.com> wrote:
> 
> Hi Sander:
>     Thank you for your advices, and it works. But it is only available in th local vector. 

  This should work on the global vector. Please send the full output of the error messages when used with a global vector.

   Barry

> 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> 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".
>> 
>>    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
>> 
>> 
>> 
>> 
>