VecCreateMPIWithArray

Creates a parallel, array-style vector, where the user provides the array space to store the vector values.

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

Collective on MPI_Comm

	comm	- the MPI communicator to use
	n	- local vector length, cannot be PETSC_DECIDE
	N	- global vector length (or PETSC_DECIDE to have calculated)
	array	- the user provided array to store the vector values

vv -the vector

Use VecDuplicate() or VecDuplicateVecs() to form additional vectors of the same type as an existing vector.

If the user-provided array is PETSC_NULL, then VecPlaceArray() can be used at a later stage to SET the array for storing the vector values.

PETSc does NOT free the array when the vector is destroyed via VecDestroy(). The user should not free the array until the vector is destroyed.