**fScan Reference Manual, Chapter 2 (CmdLineOptions): fft**
===== FFT -- Perform a fast Fourier transform (FFT)=====
**usage:** 
  * -fft ncycles flag name wsiz
  * -fft magnitude ncycles flag name wsiz
  * -fft phase ncycles flag name wsiz
  * -fft spectrum 0 flag name wsiz
  * -fft imaginary flag name wsiz
  * -fft real flag name wsiz
  * -fft complex flag name wsiz
  * -fft images 0 flag name wsiz

  
   -fft      ncycles flag name wsiz			-power and phase at NCYCLES freq
   			power: Fi = POWERi / SUM(POWER) * 10000  (Fratio)
   -fft      'magnitude' ncycles flag name wsiz	-power magnitude at NCYCLES freq
   -fft      'phase' ncycles flag name wsiz		-phase map (360	deg) at NCYCLES
   -fft      'spectrum' 0 flag name wsiz			-1D fft of each time course
   -fft      'images' 0 flag name wsiz			-2D fft of each image


===== =====



**See Also:**\\
[[jvs:fscan|fScan Home]], 
[[jvs:fscan:manual|fScan Manual]], 
[[jvs:fscan:manual:chapter2|CmdLineOptions]], 
[[jvs:fscan:manual:help|Manual Help]]