ISSetInfo#
Set known information about an index set.
Synopsis#
Logically Collective if ISInfoType
is IS_GLOBAL
Input Parameters#
is - the index set
info - describing a property of the index set, one of those listed below,
type -
IS_LOCAL
if the information describes the local portion of the index set,IS_GLOBAL
if it describes the whole index setpermanent -
PETSC_TRUE
if it is known that the property will persist through changes to the index set,PETSC_FALSE
otherwise If the user sets a property as permanently known, it will bypass computation of that propertyflg - set the described property as true (
PETSC_TRUE
) or false (PETSC_FALSE
)
Values of info
Describing IS
Structure#
IS_SORTED
- the [local part of the] index set is sorted in ascending orderIS_UNIQUE
- each entry in the [local part of the] index set is uniqueIS_PERMUTATION
- the [local part of the] index set is a permutation of the integers {0, 1, …, N-1}, where N is the size of the [local part of the] index setIS_INTERVAL
- the [local part of the] index set is equal to a contiguous range of integers {f, f + 1, …, f + N-1}IS_IDENTITY
- the [local part of the] index set is equal to the integers {0, 1, …, N-1}
Notes#
If type is IS_GLOBAL
, all processes that share the index set must pass the same value in flg
It is possible to set a property with ISSetInfo()
that contradicts what would be previously computed with ISGetInfo()
See Also#
Level#
advanced
Location#
src/vec/is/is/interface/index.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages