2012/4/2 Hongbin Zhang <hongbin_zhan...@hotmail.com>: > Dear Python-users, > > I am currently very confused about the Scipy routine to obtain the > eigenvectors of a complex matrix. > In attached you find two files to diagonalize a 2X2 complex Hermitian > matrix, however, on my computer, > > If I run python, I got: > > [[ 0.80322132+0.j 0.59500941+0.02827207j] > [-0.59500941+0.02827207j 0.80322132+0.j ]] > > If I compile the fortran code, I got: > > ( -0.595009410289, -0.028272068905) ( 0.802316135182, 0.038122316497) > ( -0.803221321796, 0.000000000000) ( -0.595680709955, 0.000000000000)
these results look more like eigh (except flipped) >>> numpy.linalg.eigh(numpy.array(H))[1] array([[ 0.59568071+0.j , -0.80322132+0.j ], [ 0.80231613-0.03812232j, 0.59500941-0.02827207j]]) Josef > > From the scipy webpage, it is said that numpy.linalg.eig() provides nothing > but > an interface to lapack zheevd subroutine, which is used in my fortran code. > > < /div> > Would somebody be kind to tell me how to get consistent results? > > Many thanks in advance. > > Best wishes, > > Hongbin > > > > > Ad hoc, ad loc and > quid pro quo > > > --- Jeremy Hilary Boob > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion