petsc-3.13.6 2020-09-29
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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