petsc-3.10.5 2019-03-28
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# VecMPISetGhost

Sets the ghost points for an MPI ghost vector

### Synopsis

    #include "petscvec.h"
    PetscErrorCode  VecMPISetGhost(Vec vv,PetscInt nghost,const PetscInt ghosts[])

Collective on Vec

### Input Parameters

| vv | - the MPI vector
| nghost | - number of local ghost points
| ghosts | - global indices of ghost points, these do not need to be in increasing order (sorted)

### Notes

Use VecGhostGetLocalForm() to access the local, ghosted representation of the vector.

This also automatically sets the ISLocalToGlobalMapping() for this vector.

You must call this AFTER you have set the type of the vector (with VecSetType()) and the size (with VecSetSizes()).

### See Also

VecCreateSeq(), VecCreate(), VecDuplicate(), VecDuplicateVecs(), VecCreateMPI(),
VecGhostGetLocalForm(), VecGhostRestoreLocalForm(), VecGhostUpdateBegin(), VecCreateGhostWithArray(), VecCreateMPIWithArray(), VecGhostUpdateEnd(), VecCreateGhostBlock(), VecCreateGhostBlockWithArray()

### Level

advanced

### Location

src/vec/vec/impls/mpi/pbvec.c

### Examples

src/vec/vec/examples/tutorials/ex9.c.html
Index of all Vec routines
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Index of all manual pages