Usage: mrcFFTSpectrum
Options:
[-i[nput] In (NULL )] :Essential :Input:fft
[-o[utput] Out (stdout )] :Optional :Output:spectrum
[-n N (1 )] :Optional :n-division: 2PI/n
[-axis Axis (0.0 )] :Optional :axis: 0
[-c[onfig] configFile (NULL )] :Optional :ConfigurationFile
[-m[ode] mode (0 )] :Optional :Mode
----- Additional Usage -----