from gpaw.tddft.spectrum import rotatory_strength_spectrum

rotatory_strength_spectrum(['mm-x.dat', 'mm-y.dat',
                           'mm-z.dat'],
                           'rot_spec.dat',
                           folding='Gauss', width=0.2,
                           e_min=0.0, e_max=10.0, delta_e=0.01)
