> From: jedbr...@mcs.anl.gov
> To: pengxw...@hotmail.com; petsc-users@mcs.anl.gov
> Subject: RE: [petsc-users] extract vector for a 2-D plane from a DM vector
> for a 3-D domain
> Date: Wed, 16 Oct 2013 09:59:34 -0500
>
> Roc Wang <pengxw...@hotmail.com> writes:
> > Is it possible I have both cases? 1 a few planes in the same
> > communicator; 2 many planes to separate communicator.
>
> Yeah, just create the VecScatter however you like.
I studied some examples for VecScatter. To my understand, the pathway of
extracting the plane is through extracting indexes (IS idx_to) of the 2-D plane
from the vector of the 3-D domain(IS idx_from). To do this, I have to create an
array of index for IS idx_to and create the corresponding IS by
ISCreateGeneral(). Am I right? Thanks for your informative response.
