VecCreateFromOptions#

Creates a vector whose type is set from the options database

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecCreateFromOptions(MPI_Comm comm, const char *prefix, PetscInt bs, PetscInt m, PetscInt n, Vec *vec)

Collective

Input Parameters#

comm - The communicator for the vector object
prefix - [optional] prefix for the options database
bs - the block size (commonly 1)
m - the local size (or PETSC_DECIDE)
n - the global size (or PETSC_DETERMINE)

Output Parameter#

vec - The vector object

Options Database Keys#

-vec_type - see VecType, for example seq, mpi, cuda, defaults to mpi

See Also#

Vectors and Parallel Data, Vec, VecSetType(), VecSetSizes(), VecCreateMPIWithArray(), VecCreateMPI(), VecDuplicate(), VecDuplicateVecs(), VecCreateGhost(), VecCreateSeq(), VecPlaceArray(), VecCreate(), VecType

Level#

beginner

Location#

src/vec/vec/interface/veccreate.c

Examples#

src/vec/vec/tutorials/ex42a.c
src/ksp/ksp/tutorials/ex52f.F90
src/ksp/ksp/tutorials/ex77.c
src/ksp/ksp/tutorials/ex57f.F90
src/vec/vec/tutorials/ex2f.F90
src/ksp/ksp/tutorials/ex15f.F90
src/ts/tutorials/ex11.c
src/ksp/ksp/tutorials/ex2f.F90
src/dm/field/tutorials/ex1.c

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