:orphan:
# MatCreateSeqAIJPERM
Creates a sparse matrix of type `MATSEQAIJPERM`. This type inherits from `MATSEQAIJ`, but calculates some additional permutation information that is used to allow better vectorization of some operations.  At the cost of increased storage, the `MATSEQAIJ` formatted matrix can be copied to a format in which pieces of the matrix are stored in ELLPACK format, allowing the vectorized matrix multiply routine to use stride-1 memory accesses. 
## Synopsis
```
PetscErrorCode MatCreateSeqAIJPERM(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt nz, const PetscInt nnz[], Mat *A)
```
Collective


## Input Parameters

- ***comm -*** MPI communicator, set to `PETSC_COMM_SELF`
- ***m -*** number of rows
- ***n -*** number of columns
- ***nz -*** number of nonzeros per row (same for all rows), ignored if `nnz` is given
- ***nnz -*** array containing the number of nonzeros in the various rows (possibly different for each row) or `NULL`



## Output Parameter

- ***A -*** the matrix





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

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/aijperm/aijperm.c.html#MatCreateSeqAIJPERM">src/mat/impls/aij/seq/aijperm/aijperm.c</A>


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


[Index of all Mat routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)