| is | - the index set
|
| bs | - number of elements in each block, one for each block and count of block not indices
|
| n | - the length of the index set (the number of blocks)
|
| idx | - the list of integers, these are by block, not by location
+ mode - see PetscCopyMode, only PETSC_COPY_VALUES and PETSC_OWN_POINTER are supported
|
Notes
When the communicator is not MPI_COMM_SELF, the operations on the
index sets, IS, are NOT conceptually the same as MPI_Group operations.
The index sets are then distributed sets of indices and thus certain operations
on them are collective.
Example
If you wish to index the values {0,1,4,5}, then use
a block size of 2 and idx of {0,2}.
See Also
ISCreateStride(), ISCreateGeneral(), ISAllGather()
Level:beginner
Location:src/vec/is/is/impls/block/block.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages