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

src/dm/interface/dmget.c

Examples

src/dm/impls/stag/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex2.c
src/dm/tutorials/ex14.c
src/tao/complementarity/tutorials/blackscholes.c
src/dm/impls/stag/tutorials/ex3.c
src/dm/impls/stag/tutorials/ex6.c
src/dm/impls/stag/tutorials/ex4.c
src/dm/impls/plex/tutorials/ex6.c
src/tao/bound/tutorials/jbearing2.c
src/tao/unconstrained/tutorials/minsurf2.c

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Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages