VecSetSizes

Sets the local and global sizes, and checks to determine compatibility of the sizes

Synopsis

#include "petscvec.h"   
PetscErrorCode VecSetSizes(Vec v, PetscInt n, PetscInt N)

Collective

Input Parameters

• v - the vector

• n - the local size (or PETSC_DECIDE to have it set)

• N - the global size (or PETSC_DETERMINE to have it set)

Notes

N cannot be PETSC_DETERMINE if n is PETSC_DECIDE

If one processor calls this with N of PETSC_DETERMINE then all processors must, otherwise the program will hang.

If n is not PETSC_DECIDE, then the value determines the PetscLayout of the vector and the ranges returned by VecGetOwnershipRange() and VecGetOwnershipRanges()

See Also

Vectors and Parallel Data, Vec, VecCreate(), VecCreateSeq(), VecCreateMPI(), VecGetSize(), PetscSplitOwnership(), PetscLayout, VecGetOwnershipRange(), VecGetOwnershipRanges(), MatSetSizes()

Level

intermediate

Location

src/vec/vec/interface/vector.c

Examples

src/tao/pde_constrained/tutorials/elliptic.c
src/tao/constrained/tutorials/tomographyADMM.c
src/tao/constrained/tutorials/ex1.c
src/mat/tutorials/ex19.c
src/tao/tutorials/ex4.c
src/tao/constrained/tutorials/maros.c
src/dm/tutorials/ex14.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/snes/tutorials/ex99.c
src/tao/pde_constrained/tutorials/parabolic.c

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Index of all Vec routines
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Index of all manual pages