ISConcatenate#

Forms a new IS by locally concatenating the indices from an IS list without reordering.

Synopsis#

#include "petscis.h"  
PetscErrorCode ISConcatenate(MPI_Comm comm, PetscInt len, const IS islist[], IS *isout)

Collective

Input Parameters#

  • comm - communicator of the concatenated IS.

  • len - size of islist array (nonnegative)

  • islist - array of index sets

Output Parameter#

  • isout - The concatenated index set; empty, if len == 0.

Notes#

The semantics of calling this on comm imply that the comms of the members of islist also contain this rank.

See Also#

Low-level Vector Communication, IS, ISDifference(), ISSum(), ISExpand(), ISIntersect()

Level#

intermediate

Location#

src/vec/is/is/utils/isdiff.c

Examples#

src/ksp/ksp/tutorials/ex43.c

Index of all IS routines
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Index of all manual pages