# DMSwarmCreateLocalVectorFromField
Creates a Vec object sharing the array associated with a given field 
## Synopsis
```
#include "petscdmswarm.h"   
PetscErrorCode DMSwarmCreateLocalVectorFromField(DM dm, const char fieldname[], Vec *vec)
```
Collective on dm


## Input parameters

- ***dm -*** a DMSwarm
- ***fieldname -*** the textual name given to a registered field



## Output parameter

- ***vec -*** the vector





## Notes
The vector must be returned using a matching call to DMSwarmDestroyLocalVectorFromField().


## See Also
 `DMSwarmRegisterPetscDatatypeField()`, `DMSwarmDestroyLocalVectorFromField()`

## Level
beginner

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


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


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