VecSetValue#
Set a single entry into a vector.
Synopsis#
static inline PetscErrorCode VecSetValue(Vec v, PetscInt i, PetscScalar va, InsertMode mode)
Not Collective
Input Parameters#
v - the vector
row - the row location of the entry
value - the value to insert
mode - either
INSERT_VALUES
orADD_VALUES
Notes#
For efficiency one should use VecSetValues()
and set several or
many values simultaneously if possible.
These values may be cached, so VecAssemblyBegin()
and VecAssemblyEnd()
MUST be called after all calls to VecSetValue()
have been completed.
VecSetValue()
uses 0-based indices in Fortran as well as in C.
See Also#
Vectors and Parallel Data, VecSetValues()
, VecAssemblyBegin()
, VecAssemblyEnd()
, VecSetValuesBlockedLocal()
, VecSetValueLocal()
Level#
beginner
Location#
Examples#
src/tao/constrained/tutorials/ex1.c
src/snes/tutorials/ex28.c
src/ts/tutorials/extchemfield.c
src/tao/unconstrained/tutorials/eptorsion3.c
src/snes/tutorials/ex70.c
src/ts/tutorials/extchem.c
src/snes/tutorials/ex30.c
src/ksp/ksp/tutorials/ex49.c
src/vec/vec/tutorials/ex1.c
src/snes/tutorials/ex56.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages