:orphan:
# PetscSectionSetPermutation
Sets a permutation of the chart for this section, [0, `pEnd` - `pStart`), which determines the order to store the `PetscSection` information 
## Synopsis
```
#include "petscsection.h"   
PetscErrorCode PetscSectionSetPermutation(PetscSection s, IS perm)
```
Not Collective


## Input Parameters

- ***s -*** the `PetscSection`
- ***perm -*** the permutation of points





## Notes
The permutation must be provided before `PetscSectionSetUp()`.

The data in the `PetscSection` are permuted but the access via `PetscSectionGetFieldOffset()` and `PetscSectionGetOffset()` is not changed

Compart to `PetscSectionPermute()`


## See Also
 [](sec_scatter), `IS`, `PetscSection`, `PetscSectionSetUp()`, `PetscSectionGetPermutation()`, `PetscSectionPermute()`, `PetscSectionCreate()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/section/interface/section.c.html#PetscSectionSetPermutation">src/vec/is/section/interface/section.c</A>


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