petsc-3.11.4 2019-09-28
VecISCopy
Copies between a reduced vector and the appropriate elements of a full-space vector.
Synopsis
#include "petscvec.h"
PetscErrorCode VecISCopy(Vec vfull, IS is, ScatterMode mode, Vec vreduced)
Input Parameters
| vfull | - the full-space vector
|
| is | - the index set for the reduced space
|
| mode | - the direction of copying, SCATTER_FORWARD or SCATTER_REVERSE
|
| 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.
mode == SCATTER_FORWARD: vfull[is[i]] = vreduced[i]
mode == SCATTER_REVERSE: vreduced[i] = vfull[is[i]]
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