:orphan:
# DMStagVecSplitToDMDA
create a `DMDA` and `Vec` from a subgrid of a `DMSTAG` and its `Vec`
## Synopsis
```
PetscErrorCode DMStagVecSplitToDMDA(DM dm, Vec vec, DMStagStencilLocation loc, PetscInt c, DM *pda, Vec *pdavec)
```
Collective
## Input Parameters
- ***dm -*** the `DMSTAG` object
- ***vec-*** Vec object associated with `dm`
- ***loc -*** which subgrid to extract (see `DMStagStencilLocation`)
- ***c -*** which component to extract (see note below)
## Output Parameters
- ***pda -*** the `DMDA`
- ***pdavec -*** the new `Vec`
## Notes
If a `c` value of `-k` is provided, the first `k` DOF for that position are extracted,
padding with zero values if needed. If a non-negative value is provided, a single
DOF is extracted.
The caller is responsible for destroying the created `DMDA` and `Vec`.
## See Also
[](ch_stag), `DMSTAG`, `DMDA`, `DMStagStencilLocation`, `DM`, `Vec`, `DMStagMigrateVec()`, `DMStagCreateCompatibleDMStag()`
## Level
advanced
## Location
src/dm/impls/stag/stagda.c
## Examples
src/dm/impls/stag/tutorials/ex4.c
src/dm/impls/stag/tutorials/ex6.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/stag/stagda.c)
[Index of all DMStag routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)