# MatDenseReplaceArray
Allows one to replace the array in a dense matrix with an array provided by the user. This is useful to avoid copying an array into a matrix 
## Synopsis
```
#include "petscmat.h"  
PetscErrorCode MatDenseReplaceArray(Mat mat, const PetscScalar *array)
```
Not Collective


## Input Parameters

- ***mat -*** the matrix
- ***array -*** the array in column major order



## Note
The memory passed in MUST be obtained with `PetscMalloc()` and CANNOT be
freed by the user. It will be freed when the matrix is destroyed.




## See Also
 `MatDensePlaceArray()`, `MatDenseGetArray()`, `VecReplaceArray()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/mpi/mpidense.c.html#MatDenseReplaceArray">src/mat/impls/dense/mpi/mpidense.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/mpi/mpidense.c.html#MatDenseReplaceArray_MPIDense">MatDenseReplaceArray_MPIDense in src/mat/impls/dense/mpi/mpidense.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/seq/dense.c.html#MatDenseReplaceArray_SeqDense">MatDenseReplaceArray_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>


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


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