VecSetValuesBlockedLocal

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

Synopsis

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

Not Collective

Input Parameters

• x - vector to insert in

• ni - number of blocks to add

• ix - indices where to add in block count, not element count

• y - array of values

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

Notes

VecSetValuesBlockedLocal() sets x[bsix[i]+j] = y[bsi+j], for j=0,..bs-1, for i=0,…,ni-1, where bs has been set with VecSetBlockSize().

Calls to VecSetValuesBlockedLocal() 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 VecSetValuesBlockedLocal() have been completed.

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

Fortran Note

If any of ix and y are scalars pass them using, for example,

  VecSetValuesBlockedLocal(mat, one, [ix], [y], INSERT_VALUES)

See Also

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

Level

intermediate

Location

src/vec/vec/interface/rvector.c

Examples

src/ksp/ksp/tutorials/ex71.c

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Index of all Vec routines
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Index of all manual pages