# MatKAIJGetSRead
Get a read-only pointer to the S matrix describing the shift action of the `MATKAIJ` matrix 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatKAIJGetSRead(Mat A, PetscInt *m, PetscInt *n, const PetscScalar **S)
```
Not Collective; the entire S is stored and returned independently on all processes.


## Input Parameter

- ***A -*** the `MATKAIJ` matrix



## Output Parameters

- ***m -*** the number of rows in S
- ***n -*** the number of columns in S
- ***S -*** the S matrix, in form of a scalar array in column-major format



## Note
All output parameters are optional (pass NULL if not desired)




## See Also
 `MATKAIJ`, `MatCreateKAIJ()`, `MatGetBlockSizes()`

## Level
advanced

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


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