# MatGetRowSum
Gets the sum of each row of the matrix 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatGetRowSum(Mat mat, Vec v)
```
Logically or Neighborhood Collective on mat


## Input Parameters

- ***mat -*** the matrix



## Output Parameter

- ***v -*** the vector for storing the sum of rows





## Notes
This code is slow since it is not currently specialized for different formats


## See Also
 `MatGetDiagonal()`, `MatCreateSubMatrices()`, `MatCreateSubMatrix()`, `MatGetRowMax()`, `MatGetRowMin()`, `MatGetRowMaxAbs()`, `MatGetRowMinAbs()`

## Level
intermediate

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