:orphan:
# MatPartitioningSetNParts
Set how many partitions need to be created; by default this is one per processor. Certain partitioning schemes may in fact only support that option. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatPartitioningSetNParts(MatPartitioning part, PetscInt n)
```
Collective


## Input Parameters

- ***partitioning -*** the partitioning context
- ***n -*** the number of partitions





## See Also
 [](ch_matrices), `Mat`, `MatPartitioning`, `MatPartitioningCreate()`, `MatPartitioningApply()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/partition/partition.c.html#MatPartitioningSetNParts">src/mat/partition/partition.c</A>


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


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