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# DMStagVecSetValuesStencil
Set `Vec` values using global grid indexing 
## Synopsis
```
PetscErrorCode DMStagVecSetValuesStencil(DM dm, Vec vec, PetscInt n, const DMStagStencil *pos, const PetscScalar *val, InsertMode insertMode)
```
Not Collective


## Input Parameters

- ***dm -*** the `DMSTAG` object
- ***vec -*** the `Vec`
- ***n -*** the number of values to set
- ***pos -*** the locations to set values, as an array of `DMStagStencil` structs
- ***val -*** the values to set
- ***insertMode -*** `INSERT_VALUES` or `ADD_VALUES`



## Notes
The vector is expected to be a global vector compatible with the DM (usually obtained by `DMGetGlobalVector()` or `DMCreateGlobalVector()`).

This approach is not as efficient as setting values directly with `DMStagVecGetArray()`, which is recommended for matrix-free operators.
For assembling systems, where overhead may be less important than convenience, this routine could be helpful in assembling a righthand side and a matrix (using `DMStagMatSetValuesStencil()`).




## See Also
 [](ch_stag), `DMSTAG`, `Vec`, `DMStagStencil`, `DMStagStencilLocation`, `DMStagVecGetValuesStencil()`, `DMStagMatSetValuesStencil()`, `DMCreateGlobalVector()`, `DMGetLocalVector()`, `DMStagVecGetArray()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/stagstencil.c.html#DMStagVecSetValuesStencil">src/dm/impls/stag/stagstencil.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex1.c.html">src/dm/impls/stag/tutorials/ex1.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex2.c.html">src/dm/impls/stag/tutorials/ex2.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex3.c.html">src/dm/impls/stag/tutorials/ex3.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex4.c.html">src/dm/impls/stag/tutorials/ex4.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex6.c.html">src/dm/impls/stag/tutorials/ex6.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/stag/tutorials/ex8.c.html">src/dm/impls/stag/tutorials/ex8.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/stag/stagstencil.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)