Hi, 2012/4/2 Hongbin Zhang <[email protected]>: > 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) > > 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?
I should also point out that matlab and octave give the same answer as your Fortran routine: octave:15> H=[0.6+0.0j, -1.97537668-0.09386068j; -1.97537668+0.09386068j, -0.6+0.0j] H = 0.60000 + 0.00000i -1.97538 - 0.09386i -1.97538 + 0.09386i -0.60000 + 0.00000i Best, Matthew _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
