petsc-3.14.6 2021-03-30
VecSetValue
Set a single entry into a vector.
Synopsis
#include <petscvec.h>
PetscErrorCode VecSetValue(Vec v,PetscInt row,PetscScalar value, 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 or ADD_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
VecSetValues(), VecAssemblyBegin(), VecAssemblyEnd(), VecSetValuesBlockedLocal(), VecSetValueLocal()
Level
beginner
Location
src/vec/vscat/../../../include/petscvec.h
Examples
src/ksp/ksp/tutorials/ex43.c.html
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex56.c.html
src/snes/tutorials/ex28.c.html
src/snes/tutorials/ex30.c.html
src/snes/tutorials/ex56.c.html
src/snes/tutorials/ex70.c.html
src/ts/tutorials/extchem.c.html
src/ts/tutorials/extchemfield.c.html
src/tao/constrained/tutorials/ex1.c.html
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages