This function tranforms the Working Data between the frequency and time domains and may also provide a frequency function (IDFRD) data set.
Choose linear or logarithmic spacing by the popup-menu, and enter the disired number of frequency values in the box Number of Frequencies. Then a frequency vector vector with this number of points and this spacing is formed. The frequency span, for a time domain data set is from 0 (excluded) to the Nyquist frequency. For frequency domain data it is between the smallest and largest frequencies in the data set.
The frequency resolution in this calculation is adjusted to the frequency spacing. This means that the default resolution in SPAFDR is used. (See HELP SPAFDR.)