VecSetValuesLocal#

Inserts or adds values into certain locations of a vector, using a local ordering of the nodes.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecSetValuesLocal(Vec x, PetscInt ni, const PetscInt ix[], const PetscScalar y[], InsertMode iora)

Not Collective

Input Parameters#

  • x - vector to insert in

  • ni - number of elements to add

  • ix - indices where to add

  • y - array of values

  • iora - either INSERT_VALUES replaces existing entries with new values, ADD_VALUES adds values to any existing entries

Notes#

VecSetValuesLocal() sets x[ix[i]] = y[i], for i=0,…,ni-1.

Calls to VecSetValues() with the INSERT_VALUES and ADD_VALUES options cannot be mixed without intervening calls to the assembly routines.

These values may be cached, so VecAssemblyBegin() and VecAssemblyEnd() MUST be called after all calls to VecSetValuesLocal() have been completed.

VecSetValuesLocal() uses 0-based indices in Fortran as well as in C.

See Also#

Vectors and Parallel Data, Vec, VecAssemblyBegin(), VecAssemblyEnd(), VecSetValues(), VecSetLocalToGlobalMapping(), VecSetValuesBlockedLocal()

Level#

intermediate

Location#

src/vec/vec/interface/rvector.c

Examples#

src/ksp/ksp/tutorials/ex35.cxx
src/vec/vec/tutorials/ex8f.F90
src/vec/vec/tutorials/ex8.c
src/ksp/ksp/tutorials/ex36.cxx
src/tao/unconstrained/tutorials/eptorsion2f.F90
src/tao/unconstrained/tutorials/eptorsion2.c


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