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)
Logically Collective
Input Parameters#
- vfull - the full-space vector 
- is - the index set for the reduced space 
- mode - the direction of copying, - SCATTER_FORWARDor- SCATTER_REVERSE
- vreduced - the reduced-space vector 
Output Parameter#
- 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#
Level#
advanced
Location#
Examples#
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages