ISCreate#
Creates an index set object. IS are objects used to do efficient indexing into other data structures such as Vec and Mat
Synopsis#
#include "petscis.h"
PetscErrorCode ISCreate(MPI_Comm comm, IS *is)
Collective
Input Parameter#
comm - the MPI communicator
Output Parameter#
is - the new index set
Notes#
When the communicator is not MPI_COMM_SELF, the operations on is are NOT
conceptually the same as MPI_Group operations. The IS are then
distributed sets of indices and thus certain operations on them are
collective.
See Also#
Low-level Vector Communication, IS, ISType(), ISSetType(), ISCreateGeneral(), ISCreateStride(), ISCreateBlock(), ISAllGather()
Level#
beginner
Location#
Examples#
src/ksp/ksp/tutorials/ex76f.F90
src/ksp/ksp/tutorials/ex76.c
src/ksp/ksp/tutorials/ex27.c
src/ksp/ksp/tutorials/ex87.c
Implementations#
ISCreate_Block() in src/vec/is/is/impls/block/block.c
ISCreate_General() in src/vec/is/is/impls/general/general.c
ISCreate_Stride() in src/vec/is/is/impls/stride/stride.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages