slepc-3.17.1 2022-04-11
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Sorts a list of eigenvalues according to the sorting criterion specified in a SlepcSC context.


#include "slepcsys.h" 
PetscErrorCode SlepcSortEigenvalues(SlepcSC sc,PetscInt n,PetscScalar *eigr,PetscScalar *eigi,PetscInt *perm)
Not Collective

Input Parameters

sc  - the sorting criterion context
n  - number of eigenvalues in the list
eigr  - pointer to the array containing the eigenvalues
eigi  - imaginary part of the eigenvalues (only when using real numbers)

Output Parameter

perm  - permutation array. Must be initialized to 0:n-1 on input.


The result is a list of indices in the original eigenvalue array corresponding to the first n eigenvalues sorted in the specified criterion.

See Also

SlepcSCCompare(), SlepcSC

Location: src/sys/slepcsc.c
Index of all sys routines
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