ISExpand#
Computes the union of two index sets, by concatenating 2 lists and removing duplicates.
Synopsis#
#include "petscis.h"
PetscErrorCode ISExpand(IS is1, IS is2, IS *isout)
Collective on IS
Input Parameters#
is1 - first index set
is2 - index values to be added
Output Parameters#
isout - is1 + is2 The index set is2 is appended to is1 removing duplicates
Notes#
Negative values are removed from the lists. This requires O(imax-imin) memory and O(imax-imin) work, where imin and imax are the bounds on the indices in is1 and is2.
The IS’s do not need to be sorted.
See Also#
ISDestroy()
, ISView()
, ISDifference()
, ISSum()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex81.c.html
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages