ISCreateSubIS#
Create a sub index set from a global index set selecting some components.
Synopsis#
#include "petscis.h"
PetscErrorCode ISCreateSubIS(IS is, IS comps, IS *subis)
Collective
Input Parameters#
is - the index set
comps - which components we will extract from
is
Output Parameters#
subis - the new sub index set
Example usage#
We have an index set is living on 3 processes with the following values:
| 4 9 0 | 2 6 7 | 10 11 1|
and another index set comps used to indicate which components of is we want to take,
| 7 5 | 1 2 | 0 4|
The output index set subis should look like:
| 11 7 | 9 0 | 4 6|
See Also#
Level#
intermediate
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