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#
Level#
advanced
Location#
Examples#
src/snes/tutorials/ex13.c.html
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages