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# MatMAIJRedimension
Get a new `MATMAIJ` matrix with the same action, but for a different block size 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatMAIJRedimension(Mat A, PetscInt dof, Mat *B)
```
Logically Collective


## Input Parameters

- ***A -*** the `MATMAIJ` matrix
- ***dof -*** the block size for the new matrix



## Output Parameter

- ***B -*** the new `MATMAIJ` matrix





## See Also
 [](ch_matrices), `Mat`, `MATMAIJ`, `MatCreateMAIJ()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/maij/maij.c.html#MatMAIJRedimension">src/mat/impls/maij/maij.c</A>


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


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