PetscSortSplit#

Quick-sort split of an array of PetscScalars in place.

Synopsis#

#include "petscsys.h"  
PetscErrorCode PetscSortSplit(PetscInt ncut, PetscInt n, PetscScalar a[], PetscInt idx[])

Not Collective

Input Parameters#

  • ncut - splitig index

  • n - number of values to sort

Input/Output Parameters#

  • a - array of values, on output the values are permuted such that its elements satisfy: abs(a[i]) >= abs(a[ncut-1]) for i < ncut and abs(a[i]) <= abs(a[ncut-1]) for i >= ncut

  • idx - index for array a, on output permuted accordingly

See Also#

PetscSortInt(), PetscSortRealWithPermutation()

Level#

intermediate

Location#

src/sys/utils/sortd.c

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