[petsc-users] question about DMDA vector

[Hailong Xiao]

So, I do not need to call the VecAssemblyBegin; and VecAssemblyEnd;
routines in order to set the values of f?

On Sat, Dec 3, 2011 at 5:02 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Sat, Dec 3, 2011 at 17:00, Hailong Xiao <xiaohl1986 at gmail.com> wrote:
>
>> PetscScalar **f,**u;
>> ...
>> DMDAVecGetArray(DM da,Vec local,(void*)&u);
>> DMDAVecGetArray(DM da,Vec global,(void*)&f);
>> ...
>> f[i][j] = u[i][j] - ...
>>
>>
>> does it change the values in vector "global" after I change the values in
>> "f"?
>>
>
> This sets the values in global, but you can only address "owned" parts of
> the global vector.
>



-- 
Hailong
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