# MatColoringPatch
sed inside matrix coloring routines that use `MatGetRowIJ()` and/or `MatGetColumnIJ()`. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatColoringPatch(Mat mat, PetscInt ncolors, PetscInt n, ISColoringValue colorarray[], ISColoring *iscoloring)
```
Collective on mat


## Input Parameters

- ***mat -*** the matrix
- ***ncolors -*** max color value
- ***n   -*** number of entries in colorarray
- ***colorarray -*** array indicating color for each column



## Output Parameters

- ***iscoloring -*** coloring generated using colorarray information





## See Also
 `MatGetRowIJ()`, `MatGetColumnIJ()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/interface/matrix.c.html#MatColoringPatch">src/mat/interface/matrix.c</A>


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


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