# DMPlexGetLocalOffsets
Allocate and populate array of local offsets. 
## Synopsis
```
#include "petscdmplex.h"          
PetscErrorCode DMPlexGetLocalOffsets(DM dm, DMLabel domain_label, PetscInt label_value, PetscInt height, PetscInt dm_field, PetscInt *num_cells, PetscInt *cell_size, PetscInt *num_comp, PetscInt *l_size, PetscInt **offsets)
```

## Input Parameters

- ***dm -*** The `DMPLEX` object
- ***domain_label -*** label for `DMPLEX` domain, or NULL for whole domain
- ***label_value -*** Stratum value
- ***height -*** Height of target cells in `DMPLEX` topology
- ***dm_field -*** Index of `DMPLEX` field



## Output Parameters

- ***num_cells -*** Number of local cells
- ***cell_size -*** Size of each cell, given by cell_size * num_comp = num_dof
- ***num_comp -*** Number of components per dof
- ***l_size -*** Size of local vector
- ***offsets -*** Allocated offsets array for cells





## Notes
Allocate and populate array of shape [num_cells, cell_size] defining offsets for each value (cell, node) for local vector of the `DMPLEX` field. All offsets are in the range [0, l_size - 1].

Caller is responsible for freeing the offsets array using `PetscFree()`.


## See Also
 [](chapter_unstructured), `DM`, `DMPLEX`, `DMLabel`, `DMPlexGetClosureIndices()`, `DMPlexSetClosurePermutationTensor()`, `DMPlexGetCeedRestriction()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexceed.c.html#DMPlexGetLocalOffsets">src/dm/impls/plex/plexceed.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex8.c.html">src/dm/impls/plex/tutorials/ex8.c.html</A><BR>


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


[Index of all DMPlex routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
