:orphan:
# ISCreateStride
Creates a data structure for an index set containing a list of evenly spaced integers. 
## Synopsis
```
#include "petscis.h"   
PetscErrorCode ISCreateStride(MPI_Comm comm, PetscInt n, PetscInt first, PetscInt step, IS *is)
```
Collective


## Input Parameters

- ***comm -*** the MPI communicator
- ***n -*** the length of the locally owned portion of the index set
- ***first -*** the first element of the locally owned portion of the index set
- ***step -*** the change to the next index



## Output Parameter

- ***is -*** the new index set





## Notes
`ISStrideSetStride()` may be used to set the stride of an `ISSTRIDE` that already exists

When the communicator is not `MPI_COMM_SELF`, the operations on `IS` are NOT
conceptually the same as `MPI_Group` operations. The `IS` are the
distributed sets of indices and thus certain operations on them are collective.


## See Also
 [](sec_scatter), `IS`, `ISStrideSetStride()`, `ISCreateGeneral()`, `ISCreateBlock()`, `ISAllGather()`, `ISSTRIDE`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/is/impls/stride/stride.c.html#ISCreateStride">src/vec/is/is/impls/stride/stride.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex1f90.F90.html">src/dm/impls/plex/tutorials/ex1f90.F90</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/ex22.c.html">src/dm/tutorials/ex22.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/tutorials/ex6.c.html">src/dm/tutorials/ex6.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex59.c.html">src/ksp/ksp/tutorials/ex59.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex71.c.html">src/ksp/ksp/tutorials/ex71.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex73.c.html">src/ksp/ksp/tutorials/ex73.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex82.c.html">src/ksp/ksp/tutorials/ex82.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/pde_constrained/tutorials/elliptic.c.html">src/tao/pde_constrained/tutorials/elliptic.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/pde_constrained/tutorials/hyperbolic.c.html">src/tao/pde_constrained/tutorials/hyperbolic.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/pde_constrained/tutorials/parabolic.c.html">src/tao/pde_constrained/tutorials/parabolic.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/is/tutorials/ex2.c.html">src/vec/is/is/tutorials/ex2.c</A><BR>


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


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