iFit/Sqw_check

PURPOSE

SYNOPSIS

DESCRIPTION

 Sqw_check: check if a 2D iData is a S(q,w).

 This routine can also convert automatically an input 
         S(phi,t)  into S(phi,w)
   and   S(phi,w)  into S(q,  w).

 conventions:
 omega = Ei-Ef = energy lost by the neutron
    omega > 0, neutron looses energy, can not be higher than Ei (Stokes)
    omega < 0, neutron gains energy, anti-Stokes

 input:
   s: Sqw data set
        e.g. 2D data set with w as 1st axis (rows), q as 2nd axis.

 Example: sqw=Sqw_check('SQW_coh_lGe.nc');
 (c) E.Farhi, ILL. License: EUPL.

CROSS-REFERENCE INFORMATION

• Sqw_check Sqw_check: check if a 2D iData is a S(q,w).
• Sqw_check Sqw_check: check if a 2D iData is a S(q,w).
• Sqw_parameters [s,p,fields] = Sqw_parameters(s,type): search for parameter values in a Sqw/Sab data set
• Sqw_parameters [s,p,fields] = Sqw_parameters(s,type): search for parameter values in a Sqw/Sab data set

• Sqw_Bosify Sqw_Bosify: apply the 'Bose' factor (detailed balance) to a classical data set.
• Sqw_Bosify Sqw_Bosify: apply the 'Bose' factor (detailed balance) to a classical data set.
• Sqw_McStas [this, parameters] = Sqw_McStas(this) : write Sqw file for McStas
• Sqw_McStas [this, parameters] = Sqw_McStas(this) : write Sqw file for McStas
• Sqw_Sab Sqw = Sqw_Sab(Sqw, M, T)
• Sqw_Sab Sqw = Sqw_Sab(Sqw, M, T)
• Sqw_Sq Sqw_Sq: compute the structure factor
• Sqw_Sq Sqw_Sq: compute the structure factor
• Sqw_check Sqw_check: check if a 2D iData is a S(q,w).
• Sqw_check Sqw_check: check if a 2D iData is a S(q,w).
• Sqw_deBosify Sqw_deBosify: remove Bose factor (detailed balance) from an 'experimental' data set.
• Sqw_deBosify Sqw_deBosify: remove Bose factor (detailed balance) from an 'experimental' data set.
• Sqw_dynamic_range [sqw_Ei,sphiw]=Sqw_dynamic_range(s,Ei): crop the S(|q|,w) to the available dynamic range
• Sqw_dynamic_range [sqw_Ei,sphiw]=Sqw_dynamic_range(s,Ei): crop the S(|q|,w) to the available dynamic range
• Sqw_moments moments=Sqw_moments(sqw, M, T, classical): compute Sqw moments (harmonic frequencies)
• Sqw_moments moments=Sqw_moments(sqw, M, T, classical): compute Sqw moments (harmonic frequencies)
• Sqw_scatt_xs Sqw_scatt_xs(s,Ei): compute the total scattering cross section for
• Sqw_scatt_xs Sqw_scatt_xs(s,Ei): compute the total scattering cross section for
• Sqw_symmetrize Sqw_symmetrize(s): extend the S(|q|,w) in both energy sides
• Sqw_symmetrize Sqw_symmetrize(s): extend the S(|q|,w) in both energy sides
• sqw_phonon_dos sqw_phonon_dos: compute the density of states (gDOS or vDOS)
• sqw_phonon_dos sqw_phonon_dos: compute the density of states (gDOS or vDOS)