# DMNetworkGetGlobalVecOffset
Get the global offset for accessing the variables associated with a component for the given vertex/edge from the global vector 
## Synopsis
```
#include "petscdmnetwork.h"  
PetscErrorCode DMNetworkGetGlobalVecOffset(DM dm, PetscInt p, PetscInt compnum, PetscInt *offsetg)
```
Not Collective


## Input Parameters

- ***dm -*** the DMNetwork object
- ***p -*** the edge or vertex point
- ***compnum -*** component number; use ALL_COMPONENTS if no specific component is requested



## Output Parameters

- ***offsetg -*** the global offset



## Notes
These offsets can be passed to MatSetValues() for matrices obtained with DMCreateMatrix().

For vectors obtained with DMCreateGlobalVector() the offsets can be used with VecSetValues().

For vectors obtained with DMCreateGlobalVector() and the array obtained with VecGetArray(vec,&array) you can access or set
the vector values with array[offset - rstart] where restart is obtained with VecGetOwnershipRange(v,&rstart,NULL);




## See Also
 `DMNetworkGetLocalVecOffset()`, `DMGetGlobalVector()`, `DMNetworkGetComponent()`, `DMCreateGlobalVector()`, `VecGetArray()`, `VecSetValues()`, `MatSetValues()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/network/network.c.html#DMNetworkGetGlobalVecOffset">src/dm/impls/network/network.c</A>


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


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