petsc-3.11.4 2019-09-28

DMGetLocalVector

Gets a Seq PETSc vector that may be used with the DMXXX routines. This vector has spaces for the ghost values.

Synopsis

#include "petscdm.h" 
PetscErrorCode  DMGetLocalVector(DM dm,Vec *g)

Not Collective

Input Parameter

dm -the distributed array

Output Parameter

g -the local vector

Note

The vector values are NOT initialized and may have garbage in them, so you may need to zero them.

The output parameter, g, is a regular PETSc vector that should be returned with DMRestoreLocalVector() DO NOT call VecDestroy() on it.

This is intended to be used for vectors you need for a short time, like within a single function call. For vectors that you intend to keep around (for example in a C struct) or pass around large parts of your code you should use DMCreateLocalVector().

VecStride*() operations can be useful when using DM with dof > 1

Keywords

distributed array, create, local, vector

Level

beginner

Location

src/dm/interface/dmget.c

Examples