Options for Data Spectra

Additional Options submenus:

Periodogram
Spectral analysis

  These mutually exclusive checkmenus choose how the spectra is computed. A periodogram is computed as the absolute square of the Fourier transform, divided by the number of data points, and multiplied by the sampling interval. A spectral analysis is performed according to the options set in the dialog accessed choosing Spectral analysis from the Estimate pop-up menu in the ident window.
Frequency range...
  Opens a dialog for customizing the frequency range. The default choice is 128 linearly spaced values up to the Nyquist frequency.

  Additional Style submenus:

  Frequency (rad/s)
  Frequency (Hz)
    These mutually exclusive checkmenus choose the frequency units.
  Linear frequency scale
  Log frequency scale
    These mutually exclusive checkmenus choose the frequency scale.
  Linear amplitude scale
  Log amplitude scale
    These mutually exclusive checkmenus choose the amplitude scale.

    Help topics.

    (file iduyspop.htm)