ISCreateStride#
Creates a data structure for an index set containing a list of evenly spaced integers.
Synopsis#
#include "petscis.h"
PetscErrorCode ISCreateStride(MPI_Comm comm, PetscInt n, PetscInt first, PetscInt step, IS *is)
Collective
Input Parameters#
comm - the MPI communicator
n - the length of the locally owned portion of the index set
first - the first element of the locally owned portion of the index set
step - the change to the next index
Output Parameter#
is - the new index set
Notes#
ISStrideSetStride() may be used to set the stride of an ISSTRIDE that already exists
When the communicator is not MPI_COMM_SELF, the operations on IS are NOT
conceptually the same as MPI_Group operations. The IS are the
distributed sets of indices and thus certain operations on them are collective.
See Also#
Low-level Vector Communication, IS, ISStrideSetStride(), ISCreateGeneral(), ISCreateBlock(), ISAllGather(), ISSTRIDE
Level#
beginner
Location#
Examples#
src/dm/impls/plex/tutorials/ex1f90.F90
src/dm/tutorials/ex22.c
src/dm/tutorials/ex6.c
src/ksp/ksp/tutorials/ex59.c
src/ksp/ksp/tutorials/ex71.c
src/ksp/ksp/tutorials/ex73.c
src/ksp/ksp/tutorials/ex82.c
src/tao/pde_constrained/tutorials/elliptic.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/tao/pde_constrained/tutorials/parabolic.c
src/vec/is/is/tutorials/ex2.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages