slepc-3.22.2 2024-12-02
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
src/eps/interface/epssolve.c
Examples
src/svd/tutorials/cnetwork/embedgsvd.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages