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/ts/tutorials/ex11.c
src/dm/field/tutorials/ex1.c
src/ksp/ksp/tutorials/ex77.c

Index of all Vec routines
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Index of all manual pages