petsc-3.7.5 2017-01-01
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 Parameter
| 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:src/vec/is/is/utils/isdiff.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages