# How can I plot the frequency response of the equation below using MATLAB?

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Victor Calinao Jr on 5 Oct 2021
Answered: Jesús Zambrano on 6 Oct 2021
$$\boxed{\dfrac{V_{out}(j\omega)}{V_{in}(j\omega)}=\dfrac{2\times10^9}{(1+10j\omega)(100\times10^3j\omega+20\times10^3j\omega+2\times10^9-20\times10^3j\omega}}$$
and
$$\dfrac{V_{out}(j\omega)}{V_{in}(j\omega)}=\dfrac{j\omega LR_1R_2}{(j\omega L)((1+j\omega C R_2)(j\omega LR_2+j\omega LR_1+R_1R_2)-j\omega LR_1)}$$
I am having a hard time figuring out how can I translate them into symbolic math or what I will do to them to get their frequency response plots.

Jesús Zambrano on 6 Oct 2021
Hi Victor,
tf1 = tf([2e9],[10 1]);
tf2 = tf(1, [100e3 2e9]);
mytf = tf1*tf2;
bode(mytf)
where each vector in the transfer functions should be nonempty and containing numeric data.
Hope it helps!