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[],IS *is)

Collective on MPI_Comm

Input Parameters

	comm	- the MPI communicator
	n	- the length of the index set
	idx	- the list of integers

Output Parameter

is -the new index set

Notes

The index array is copied to internally allocated storage. After the call, the user can free the index array.

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.

Examples