[petsc-users] No VecGetLocalSubVector?

[Jed Brown]

Garth Wells <gnw20 at cam.ac.uk> writes:

> On Wed, 2018-03-07 at 16:13 -0700, Jed Brown wrote:
>> No reason, just didn't need it.  I don't think any PETSc developers
>> use
>> VecSetValues* because VecScatter is a more natural interface with
>> lower
>> overhead.
>> 
>
> Any demos of its recommended use?

snes/examples/tutorials/ex28.c is my recommended demo for both
MatGetLocalSubMatrix() and composite vectors.  You can follow the
example (using DMComposite) or call VecScatter directly.