# VecStrideSumAll
Computes the sums of subvectors of a vector defined by a stride. 
## Synopsis
```
#include "petscvec.h" 
PetscErrorCode VecStrideSumAll(Vec v, PetscScalar sums[])
```
Collective on Vec


## Input Parameter

- ***v -*** the vector



## Output Parameter

- ***sums -*** the sums



## Notes
One must call `VecSetBlockSize()` before this routine to set the stride
information, or use a vector created from a multicomponent `DMDA`.

If x is the array representing the vector x then this computes the sum
of the array (x[start],x[start+stride],x[start+2*stride], ....) for each start < stride




## See Also
 `VecSum()`, `VecStrideGather()`, `VecStrideScatter()`, `VecStrideMin()`, `VecStrideMax()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/utils/vinv.c.html#VecStrideSumAll">src/vec/vec/utils/vinv.c</A>


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


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