petsc-3.13.6 2020-09-29

VecSetValuesLocal

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

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

Not Collective

	x	- vector to insert in
	ni	- number of elements to add
	ix	- indices where to add
	y	- array of values
	iora	- either INSERT_VALUES or ADD_VALUES, where ADD_VALUES adds values to any existing entries, and INSERT_VALUES replaces existing entries with new values

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.

intermediate