write down any transfer function in matlab

In MATLAB, you can represent a transfer function using the tf function. The general syntax is:

main.m
sys = tf(num, den)
19 chars
2 lines

Where num represents the vector of numerator coefficients and den represents the vector of denominator coefficients of the transfer function.

Here is an example of how to create a transfer function in MATLAB:

main.m
% Create a transfer function G(s) = (s+3)/(s^2 + 4s + 5)
num = [1 3]; % Numerator coefficients [1 3]
den = [1 4 5]; % Denominator coefficients [1 4 5]

sys = tf(num, den); % Transfer function in MATLAB
202 chars
6 lines

You can also create transfer functions by defining poles and zeros using the zpk function and convert them to a transfer function using the tf function.