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


## Input Parameters

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



## Note
You can return to the original array with a call to `MatDenseCUDAResetArray()`. The user is responsible for freeing this array; it will not be
freed when the matrix is destroyed. The array must have been allocated with cudaMalloc().




## See Also
 `MATDENSECUDA`, `MatDenseCUDAGetArray()`, `MatDenseCUDAResetArray()`, `MatDenseCUDAReplaceArray()`

## Level
developer

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

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/mpi/mpidense.c.html#MatDenseCUDAPlaceArray_MPIDenseCUDA">MatDenseCUDAPlaceArray_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/seq/cuda/densecuda.cu.html#MatDenseCUDAPlaceArray_SeqDenseCUDA">MatDenseCUDAPlaceArray_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu</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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