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# MatPartitioningSetUseEdgeWeights
Set a flag to indicate whether or not to use edge weights. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatPartitioningSetUseEdgeWeights(MatPartitioning part, PetscBool use_edge_weights)
```
Logically Collective


## Input Parameters

- ***part -*** the partitioning context
- ***use_edge_weights -*** the flag indicateing whether or not to use edge weights. By default no edge weights will be used,
that is, use_edge_weights is set to FALSE. If set use_edge_weights to TRUE, users need to make sure legal
edge weights are stored in an ADJ matrix.



## Options Database Key

- ***-mat_partitioning_use_edge_weights -*** (true or false)





## See Also
 [](ch_matrices), `Mat`, `MatPartitioning`, `MatPartitioningCreate()`, `MatPartitioningSetType()`, `MatPartitioningSetVertexWeights()`, `MatPartitioningSetPartitionWeights()`

## Level
beginner

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

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/tutorials/ex15.c.html">src/mat/tutorials/ex15.c</A><BR>


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


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