DMDACreateNaturalVector#

Creates a parallel PETSc vector that will hold vector values in the natural numbering, rather than in the PETSc parallel numbering associated with the DMDA.

Synopsis#

#include "petscdmda.h"   
PetscErrorCode DMDACreateNaturalVector(DM da, Vec *g)

Collective

Input Parameter#

  • da - the distributed array

Output Parameter#

  • g - the distributed global vector

Notes#

The natural numbering is a number of grid nodes that starts with, in three dimensions, with (0,0,0), (1,0,0), (2,0,0), …, (m-1,0,0) followed by (0,1,0), (1,1,0), (2,1,0), …, (m,1,0) etc up to (0,n-1,p-1), (1,n-1,p-1), (2,n-1,p-1), …, (m-1,n-1,p-1).

The output parameter, g, is a regular Vec that should be destroyed with a call to VecDestroy() when usage is finished.

The number of local entries in the vector on each process is the same as in a vector created with DMCreateGlobalVector().

See Also#

DMDA - Creating vectors for structured grids, DM, DMDA, DMDAGlobalToNaturalBegin(), DMDAGlobalToNaturalEnd(), DMDANaturalToGlobalBegin(), DMDANaturalToGlobalEnd(), DMCreateLocalVector(), VecDuplicate(), VecDuplicateVecs(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMGlobalToLocalBegin(), DMGlobalToLocalEnd(), DMLocalToGlobalBegin()

Level#

advanced

Location#

src/dm/impls/da/dadist.c

Examples#

src/dm/tutorials/ex6.c
src/ksp/ksp/tutorials/ex71.c

Index of all DMDA routines
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Index of all manual pages