[petsc-users] question about DMDA vector

[Jed Brown]

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.
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