:orphan:
# MatChop
Set all values in the matrix less than the tolerance to zero 
## Synopsis
```
#include "petscmat.h"  
PetscErrorCode MatChop(Mat A, PetscReal tol)
```

## Input Parameters

- ***A   -*** The matrix
- ***tol -*** The zero tolerance





## See Also
 [](ch_matrices), `Mat`, `MatCreate()`, `MatZeroEntries()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/utils/axpy.c.html#MatChop">src/mat/utils/axpy.c</A>


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


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