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# PCBDDCSetDofsSplittingLocal
Set the `IS` defining fields of the local subdomain matrix
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCBDDCSetDofsSplittingLocal(PC pc, PetscInt n_is, IS ISForDofs[])
```
Collective
## Input Parameters
- ***pc -*** the preconditioning context
- ***n_is -*** number of index sets defining the fields, must be the same on all MPI processes
- ***ISForDofs -*** array of `IS` describing the fields in local ordering
## Note
Not all nodes need to be listed: unlisted nodes will belong to the complement field.
## See Also
`PCBDDC`, `PCBDDCSetDofsSplitting()`
## Level
intermediate
## Location
src/ksp/pc/impls/bddc/bddc.c
## Examples
src/ksp/ksp/tutorials/ex59.c
## Implementations
PCBDDCSetDofsSplittingLocal_BDDC in src/ksp/pc/impls/bddc/bddc.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/bddc/bddc.c)
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