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- function freqfunc
- %FREQFUNC Frequency functions are created by SPA, ETFE, and TH2FF.
- % They are used by BODEPLOT.
- %
- % The format of a frequency function associated with one transfer
- % function or a noise spectrum is as follows. It has between two and
- % five columns, and the number of rows equals the number of frequences
- % plus one. The first row contains integers n with input information:
- %
- % n = 0: means that the column is a spectrum
- % n = 50: The column contains the standard deviation of the spectrum
- % n =100: The column contains the frequencies for the spectrum.
- % n = k (with k between 1 and 19): the column contains amplitude
- % values for the transfer function corresponding to input k.
- % n = 20 + k: the column contains phase values for input number k.
- % n = 50 + k: the column contains amplitude standard deviation, input k.
- % n = 70 + k: the column contains phase standard deviation, input k.
- % n = 100+ k: the column contains the frequency values for input k.
- %
- % For Multi-output systems add 1000*(output # -1) to the figures above
- % For each input (spectrum) the columns are ordered as follows:
- % Frequencies, amplitude, amplitude s.d., phase, phase s.d.
- % See HELP getff for picking out specific frequency information
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