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# MatISFixLocalEmpty
Compress out zero local rows from the local matrices 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatISFixLocalEmpty(Mat A, PetscBool fix)
```
Collective


## Input Parameters

- ***A -*** the matrix
- ***fix -*** the boolean flag





## Note
When `fix` is `PETSC_TRUE`, new local matrices and l2g maps are generated during the final assembly process.


## See Also
 [](ch_matrices), `Mat`, `MATIS`, `MatCreate()`, `MatCreateIS()`, `MatISSetPreallocation()`, `MatAssemblyEnd()`, `MAT_FINAL_ASSEMBLY`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/is/matis.c.html#MatISFixLocalEmpty">src/mat/impls/is/matis.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/is/matis.c.html#MatISFixLocalEmpty_IS">MatISFixLocalEmpty_IS in src/mat/impls/is/matis.c</A><BR>


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