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# VecSetValuesCOO
set values at once in a vector preallocated using `VecSetPreallocationCOO()` 
## Synopsis
```
#include "petscvec.h"   
PetscErrorCode VecSetValuesCOO(Vec x, const PetscScalar coo_v[], InsertMode imode)
```
Collective


## Input Parameters

- ***x -*** vector being set
- ***coo_v -*** the value array
- ***imode -*** the insert mode





## Note
This and `VecSetPreallocationCOO() or ``VecSetPreallocationCOOLocal()` provide an alernative API to using `VecSetValues()` to provide vector values.

This API is particularly efficient for use on GPUs.

The values must follow the order of the indices prescribed with `VecSetPreallocationCOO()` or `VecSetPreallocationCOOLocal()`.
When repeated entries are specified in the COO indices the `coo_v` values are first properly summed, regardless of the value of `imode`.
The imode flag indicates if `coo_v` must be added to the current values of the vector (`ADD_VALUES`) or overwritten (`INSERT_VALUES`).
`VecAssemblyBegin()` and `VecAssemblyEnd()` do not need to be called after this routine. It automatically handles the assembly process.


## See Also
 [](ch_vectors), `Vec`, `VecSetPreallocationCOO()`, `VecSetPreallocationCOOLocal()`, `VecSetValues()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/interface/vector.c.html#VecSetValuesCOO">src/vec/vec/interface/vector.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx.html#VecSetValuesCOO_MPIKokkos">VecSetValuesCOO_MPIKokkos in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/mpi/pdvec.c.html#VecSetValuesCOO_MPI">VecSetValuesCOO_MPI in src/vec/vec/impls/mpi/pdvec.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/seq/bvec2.c.html#VecSetValuesCOO_Seq">VecSetValuesCOO_Seq in src/vec/vec/impls/seq/bvec2.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx.html#VecSetValuesCOO_SeqKokkos">VecSetValuesCOO_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx</A><BR>


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


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