:orphan:
# DMCreateFieldIS
Creates a set of `IS` objects with the global indices of dofs for each field defined with `DMAddField()` 
## Synopsis
```
#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMCreateFieldIS(DM dm, PetscInt *numFields, char ***fieldNames, IS **fields)
```
Not Collective; No Fortran Support


## Input Parameter

- ***dm -*** the `DM` object



## Output Parameters

- ***numFields  -*** The number of fields (or `NULL` if not requested)
- ***fieldNames -*** The number of each field (or `NULL` if not requested)
- ***fields     -*** The global indices for each field (or `NULL` if not requested)





## Note
The user is responsible for freeing all requested arrays. In particular, every entry of names should be freed with
`PetscFree()`, every entry of fields should be destroyed with `ISDestroy()`, and both arrays should be freed with
`PetscFree()`.


## Developer Note
It is not clear why both this function and `DMCreateFieldDecomposition()` exist. Having two seems redundant and confusing. This function should
likely be removed.


## See Also
 [](ch_dmbase), `DM`, `DMAddField()`, `DMGetField()`, `DMDestroy()`, `DMView()`, `DMCreateInterpolation()`, `DMCreateColoring()`, `DMCreateMatrix()`,
`DMCreateFieldDecomposition()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/interface/dm.c.html#DMCreateFieldIS">src/dm/interface/dm.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/composite/pack.c.html#DMCreateFieldIS_Composite">DMCreateFieldIS_Composite in src/dm/impls/composite/pack.c</A><BR>


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


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