Function: fftgram

FFTGRAM Plot the energy of the discrete Fourier transform
  Usage:  fftgram(f)
          fftgram(f, fs)

  FFTGRAM(f) plots the energy of the discrete Fourier transform computed 
  from the function f. The function forms a Fourier pair with the periodic
  autocorrelation function.

  FFTGRAM(f,fs) does the same for a signal sampled with a sampling
  frequency of fs Hz. If fs is no specified, the plot will display
  normalized frequencies.

  FFTGRAM(f,fs,dynrange) additionally specifies the dynamic range to
  display on the figure.

  Additional arguments for FFTGRAM:

     'db'      Plots the energy on a dB scale. This is the default.

     'lin'     Plots the energy on a linear scale.

  In addition to these parameters, FFTGRAM accepts any of the flags from
  NORMALIZE. The input signal will be normalized as specified.

Url: http://ltfat.github.io/doc/fourier/fftgram.html

See also: dft, plotfft.

Package: ltfat