freqs
Frequency response of analog filters
Description
freqs(___)
with no output arguments plots the magnitude
and phase responses as functions of angular frequency in the current figure window. You can
use this syntax with either of the previous input syntaxes.
Examples
Input Arguments
Output Arguments
Algorithms
freqs
returns the complex frequency response of an analog filter
specified by b
and a
. The function evaluates the
ratio of Laplace transform polynomials
along the imaginary axis at the frequency points s = jω:
s = 1j*w; h = polyval(b,s)./polyval(a,s);
Version History
Introduced before R2006a