DMGetLocalVector#
Gets a PETSc vector that may be used with the DM local 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
DM
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
See Also#
DM, DMCreateGlobalVector(), VecDuplicate(), VecDuplicateVecs(),
DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMGlobalToLocalBegin(),
DMGlobalToLocalEnd(), DMLocalToGlobalBegin(), DMCreateLocalVector(), DMRestoreLocalVector(),
VecStrideMax(), VecStrideMin(), VecStrideNorm(), DMClearLocalVectors(), DMGetNamedGlobalVector(), DMGetNamedLocalVector()
Level#
beginner
Location#
Examples#
src/dm/impls/stag/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/plex/tutorials/ex6.c
src/dm/tutorials/ex14.c
src/dm/impls/stag/tutorials/ex3.c
src/dm/impls/stag/tutorials/ex2.c
src/ts/tutorials/ex32.c
src/ts/tutorials/extchemfield.c
src/ts/tutorials/ex77.c
src/dm/impls/stag/tutorials/ex4.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages