VecCreateGhostWithArray

Creates a parallel vector with ghost padding on each processor; the caller allocates the array space.

#include "petscvec.h"   
int VecCreateGhostWithArray(MPI_Comm comm,int n,int N,int nghost,const int ghosts[],const PetscScalar array[],Vec *vv)

Collective on MPI_Comm

	comm	- the MPI communicator to use
	n	- local vector length
	N	- global vector length (or PETSC_DECIDE to have calculated if n is given)
	nghost	- number of local ghost points
	ghosts	- global indices of ghost points (or PETSC_NULL if not needed)
	array	- the space to store the vector values (as long as n + nghost)

vv -the global vector representation (without ghost points as part of vector)

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