petsc-3.7.5 2017-01-01

DMCompositeGetAccessArray

Allows one to access the individual packed vectors in their global representation.

#include "petscdmcomposite.h"  
PetscErrorCode  DMCompositeGetAccessArray(DM dm,Vec pvec,PetscInt nwanted,const PetscInt *wanted,Vec *vecs)

Collective on DMComposite

	dm	- the packer object
	pvec	- packed vector
	nwanted	- number of vectors wanted
	wanted	- sorted array of vectors wanted, or NULL to get all vectors

vecs -array of requested global vectors (must be allocated)

Notes: Use DMCompositeRestoreAccessArray() to return the vectors when you no longer need them