[petsc-users] extract vector for a 2-D plane from a DM vector for a 3-D domain

[Jed Brown]

Roc Wang <pengxwang at hotmail.com> writes:
>     I have a DM and its vector for a structured 3-D domain and trying
>     to extract the data for a 2-D plane.  I did some research on the
>     manual and noticed there is function named DMSlicedCreate(),
>     however, it is for unstructured problem. Is there any ohter
>     function to extract vector for a 2-D plane from DM vector for a
>     3-D domain directly?

Create a VecScatter.  Do you want to extract many planes to separate
communicators?
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