Specifications

bode
16-25
where is the sample time. is called the Nyquist frequency.The
equivalent “continuous-time frequency” is thenusedas the -axis variable.
Because
is periodic with period ,
bode plots the response only up to the Nyquist
frequency . If the sample time is unspecified, the default value is
assumed.
Diagnostics If the system has a pole on the axis (or unit circle in the discrete case) and
w happens to contain this frequency point, the gain is infinite, is
singular, and
bode produces the warning message
Singularity in freq. response due to jw-axis or unit circle pole.
See Also evalfr Response at single complex frequency
freqresp Frequency response computation
ltiview LTIsystemviewer
nichols Nichols plot
nyquist Nyquist plot
sigma Singular value plot
References [1] Laub, A.J., “Efficient Multivariable Frequency Response Computations,”
IEEE Transactions on Automatic Control, AC-26 (1981), pp. 407–408.
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