petsc-3.11.3 2019-06-26
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 arguments
| f | - IS to sort
|
| always | - build the permutation even when f's indices are nondecreasin.
|
Output argument
h -permutation or NULL, if f is nondecreasing and always == PETSC_TRUE.
Note: Indices in f are unchanged. f[h[i]] is the i-th smallest f index.
If always == PETSC_FALSE, an extra check is peformed 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
ISLocalToGlobalMapping, ISSort(), PetscIntSortWithPermutation()
Level
advanced
Location
src/vec/is/is/utils/isdiff.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages