ISSortPermutation#
calculate the permutation of the indices into a nondecreasing order.
Synopsis#
#include "petscis.h"  
PetscErrorCode ISSortPermutation(IS f, PetscBool always, IS *h)
Not Collective
Input Parameters#
- f - - ISto sort
- always - build the permutation even when - f’s indices are nondecreasing.
Output Parameter#
- h - permutation or - NULL, if- fis nondecreasing and- always==- PETSC_FALSE.
Notes#
Indices in f are unchanged. f[h[i]] is the i-th smallest f index.
If always == PETSC_FALSE, an extra check is performed to see whether
the f indices are nondecreasing. h is built on PETSC_COMM_SELF, since
the permutation has a local meaning only.
See Also#
Level#
advanced
Location#
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages