plot transfer functions in matlab

To plot a transfer function in Matlab, you can use the "tf" function to define the transfer function and then use the "bode" function to plot the frequency response of the transfer function.

Here is an example code that plots the frequency response of a transfer function:

main.m
% Define the transfer function
num = [1];
den = [1, 2, 3];
G = tf(num, den);

% Plot the frequency response
bode(G);
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In this example, the transfer function is defined as "G = 1 / (s^2 + 2s + 3)" using the "tf" function. Then, the "bode" function is used to plot the frequency response of the transfer function. The resulting plot shows the magnitude and phase of the transfer function as a function of frequency.

Note that you can also use the "nyquist" function to plot the Nyquist plot of the transfer function, or the "step" function to plot the step response of the transfer function.