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

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