# MatPartitioningChacoGetEigenNumber
Gets the number of eigenvectors used by Chaco. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatPartitioningChacoGetEigenNumber(MatPartitioning part, PetscInt *num)
```
Not Collective


## Input Parameter

- ***part -*** the partitioning context



## Output Parameter

- ***num  -*** number of eigenvectors





## See Also
 `MatPartitioningType`, `MatPartitioning`, `MATPARTITIONINGCHACO`, `MatPartitioningChacoSetEigenNumber()`

## Level
advanced

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/partition/impls/chaco/chaco.c.html#MatPartitioningChacoGetEigenNumber_Chaco">MatPartitioningChacoGetEigenNumber_Chaco in src/mat/partition/impls/chaco/chaco.c</A><BR>


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


[Index of all MatOrderings routines](index.md)  
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