petsc-3.14.6 2021-03-30
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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

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

ISCreateGeneral(), ISCreateBlock(), ISAllGather(), ISSTRIDE

Level

beginner

Location

src/vec/is/is/impls/stride/stride.c

Examples

src/vec/is/is/tutorials/ex2.c.html
src/vec/is/is/tutorials/ex2f.F.html
src/dm/impls/plex/tutorials/ex1f90.F90.html
src/dm/tutorials/ex6.c.html
src/ksp/ksp/tutorials/ex59.c.html
src/ksp/ksp/tutorials/ex71.c.html
src/ksp/ksp/tutorials/ex73.c.html
src/tao/pde_constrained/tutorials/elliptic.c.html
src/tao/pde_constrained/tutorials/parabolic.c.html
src/tao/pde_constrained/tutorials/hyperbolic.c.html

Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages