f02axf

f02axf © Numerical Algorithms Group, 2002.

Purpose

F02AXF All eigenvalues and eigenvectors of complex Hermitian matrix (Black Box)

Synopsis

[r,vr,vi,ifail] = f02axf(ar,ai<,ifail>)

Description

 
 The complex Hermitian matrix is first reduced to a real 
 tridiagonal matrix by n-2 unitary transformations and a 
 subsequent diagonal transformation. The eigenvalues and 
 eigenvectors are then derived using the QL algorithm, an 
 adaptation of the QR algorithm.

Parameters

f02axf

Required Input Arguments:

ar (:,:)                              real
ai (:,:)                              real

Optional Input Arguments:                       <Default>

ifail                                 integer  -1

Output Arguments:

r (:)                                 real
vr (:,:)                              real
vi (:,:)                              real
ifail                                 integer