EPSGetEigenvalue#
Gets the i-th eigenvalue as computed by EPSSolve().
Synopsis#
#include "slepceps.h"
PetscErrorCode EPSGetEigenvalue(EPS eps,PetscInt i,PetscScalar *eigr,PetscScalar *eigi)
Not Collective
Input Parameters#
eps - eigensolver context
i - index of the solution
Output Parameters#
eigr - real part of eigenvalue
eigi - imaginary part of eigenvalue
Notes#
If the eigenvalue is real, then eigi is set to zero. If PETSc is configured with complex scalars the eigenvalue is stored directly in eigr (eigi is set to zero).
The index i should be a value between 0 and nconv-1 (see EPSGetConverged()). Eigenpairs are indexed according to the ordering criterion established with EPSSetWhichEigenpairs().
See Also#
EPSSolve(), EPSGetConverged(), EPSSetWhichEigenpairs(), EPSGetEigenpair()
Level#
beginner
Location#
Index of all EPS routines Table of Contents for all manual pages Index of all manual pages