Sqw_symmetrize(s): extend the S(|q|,w) in both energy sides The resulting S(q,w) is the combination of S(q,w) and S(q,-w), which is thus symmetric in energy: S(q,w) = S(q,-w) The S(q,w) is a dynamic structure factor aka scattering function. The incoming data set should NOT contain the Bose factor, that is it should be 'classical'. To obtain a 'classical' S(q,w) from an experiment, use first: Sqw_deBosify(s, T) The positive energy values in the S(q,w) map correspond to Stokes processes, i.e. material gains energy, and neutrons loose energy when scattered. input: s: Sqw data set (classical, often labelled as S*) 2D data set with w as 1st axis (rows, meV), q as 2nd axis (Angs-1). output: s: S(|q|,w) symmetrised in energy Example: Sqw_symmetrize(s, 300) See also: Sqw_Bosify, deBosify, Sqw_dynamic_range, Sqw_scatt_xs (c) E.Farhi, ILL. License: EUPL.