ISInvertPermutation#
Creates a new permutation that is the inverse of a given permutation.
Synopsis#
#include "petscis.h"
PetscErrorCode ISInvertPermutation(IS is, PetscInt nlocal, IS *isout)
Collective
Input Parameters#
is - the index set
nlocal - number of indices on this processor in result (ignored for 1 processor) or use
PETSC_DECIDE
Output Parameter#
isout - the inverse permutation
Note#
For parallel index sets this does the complete parallel permutation, but the code is not efficient for huge index sets (10,000,000 indices).
See Also#
IS, ISGetInfo(), ISSetPermutation(), ISGetPermutation()
Level#
intermediate
Location#
Implementations#
ISInvertPermutation_Block() in src/vec/is/is/impls/block/block.c
ISInvertPermutation_General() in src/vec/is/is/impls/general/general.c
ISInvertPermutation_Stride() in 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