ISCreateGeneral#

Creates a data structure for an index set containing a list of integers.

Synopsis#

#include "petscis.h"  
PetscErrorCode ISCreateGeneral(MPI_Comm comm, PetscInt n, const PetscInt idx[], PetscCopyMode mode, IS *is)

Collective

Input Parameters#

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.

Use ISGeneralSetIndices() to provide indices to an already existing IS of ISType ISGENERAL

See Also#

Low-level Vector Communication, IS, ISGENERAL, ISCreateStride(), ISCreateBlock(), ISAllGather(), PETSC_COPY_VALUES, PETSC_OWN_POINTER, PETSC_USE_POINTER, PetscCopyMode, ISGeneralSetIndicesFromMask()

Level#

beginner

Location#

src/vec/is/is/impls/general/general.c

Examples#

src/vec/is/is/tutorials/ex1.c.html
src/vec/is/is/tutorials/ex1f90.F90.html
src/vec/is/is/tutorials/ex1f.F90.html
src/dm/tutorials/ex22.c.html
src/dm/tutorials/ex6.c.html
src/dm/tutorials/swarm_ex3.c.html
src/dm/field/tutorials/ex1.c.html
src/ksp/ksp/tutorials/ex49.c.html
src/ksp/ksp/tutorials/ex59.c.html
src/ksp/ksp/tutorials/ex71.c.html


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Index of all IS routines
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Index of all manual pages