petsc-3.7.7 2017-09-25
ISDifference
Computes the difference between two index sets.
Synopsis
#include "petscis.h"
PetscErrorCode ISDifference(IS is1,IS is2,IS *isout)
Collective on IS
Input Parameter
| is1 | - first index, to have items removed from it
|
| is2 | - index values to be removed
|
Output Parameters
isout -is1 - is2
Notes
Negative values are removed from the lists. is2 may have values
that are not in is1. This requires O(imax-imin) memory and O(imax-imin)
work, where imin and imax are the bounds on the indices in is1.
See Also
ISDestroy(), ISView(), ISSum(), ISExpand()
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