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#

include/petscvec.h

Examples#

src/mat/tutorials/ex3.c.html
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


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Index of all Vec routines
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Index of all manual pages