[H, wout] = freqresp(sys, w)
H = freqresp(sys, w)
| Parameter | Description |
|---|---|
| sys | LTI model |
| w | Frequencies: vector |
| Parameter | Description |
|---|---|
| H | Frequency response values |
| wout | Output frequencies corresponding to the frequency response: vector. |
freqresp computes the frequency response of a dynamic system sys at specified frequencies w.
To acquire magnitude and phase data, along with visual representations of the frequency response, utilize the bode function.
G = tf(1,[1 1]);
h1 = freqresp(G, 3)num = [1 2];
den = [1 3 2];
sys = tf(num,den);
w = linspace(0, 100, 60);
[resp,freq] = freqresp(sys, w);
f = figure();
subplot(2, 1, 1);
plot(freq, 20 * log10(abs(squeeze(resp))));
ylabel(_('Amplitude (dB)'));
subplot(2, 1, 2);
plot(freq, angle(squeeze(resp)) * 180/pi);
ylabel(_('Phase (degrees)'));
xlabel(_('Frequency (Hz)'));
| Version | Description |
|---|---|
| 1.0.0 | initial version |