petsc-3.5.1 2014-07-31
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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 on MPI_Comm

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()

Level:beginner
Location:
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

Examples

src/vec/is/is/examples/tutorials/ex2.c.html
src/vec/is/is/examples/tutorials/ex2f.F.html
src/snes/examples/tutorials/ex54.c.html
src/snes/examples/tutorials/ex74f.F90.html
src/ts/examples/tutorials/ex23.c.html
src/tao/pde_constrained/examples/tutorials/elliptic.c.html
src/tao/pde_constrained/examples/tutorials/parabolic.c.html
src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html