PETSc version 3.17.0
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# PetscSortIntWithPermutation

Computes the permutation of values that gives a sorted sequence.

### Synopsis

    #include "petscsys.h"
    PetscErrorCode  PetscSortIntWithPermutation(PetscInt n,const PetscInt i[],PetscInt idx[])

Not Collective

### Input Parameters

| n | - number of values to sort
| i | - values to sort
| idx | - permutation array. Must be initialized to 0:n-1 on input.

### Notes

On output i is unchanged and idx[i] is the position of the i-th smallest index in i.

### See Also

PetscSortInt(), PetscSortRealWithPermutation(), PetscSortIntWithArray()

### Level

intermediate

### Location

src/sys/utils/sortip.c
Index of all Sys routines
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