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freqfunc
FREQFUNC Frequency functions are created by SPA, ETFE, and TH2FF.
They are used by (see also) BODEPLOT, FFPLOT and NYQPLOT.
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 also GETFF for picking out specific frequency information.
See also ETFE, SPA, TRF, TH2FF.
| This function is called by | |
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function freqfunc % L. Ljung % Copyright (c) 1986-98 by The MathWorks, Inc. % $Revision: 2.3 $ $Date: 1997/12/02 03:43:54 $