petsc-3.12.5 2020-03-29
VecISAXPY
Adds a reduced vector to the appropriate elements of a full-space vector. vfull[is[i]] += alpha*vreduced[i]
Synopsis
#include "petscvec.h"
PetscErrorCode VecISAXPY(Vec vfull, IS is, PetscScalar alpha, Vec vreduced)
Input Parameters
| vfull | - the full-space vector
|
| is | - the index set for the reduced space
|
| alpha | - the scalar coefficient
|
| vreduced | - the reduced-space vector
|
Output Parameters
vfull -the sum of the full-space vector and reduced-space vector
Notes
The index set identifies entries in the global vector.
Negative indices are skipped; indices outside the ownership range of vfull will raise an error.
See Also
VecAXPY(), VecGetOwnershipRange()
Level
advanced
Location
src/vec/vec/utils/projection.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages