Magnitude Frequency response plot

Given

H(z)=(0.6-z^-1)(1+2z^-1)/(3-z^1)(2-(jz^-1),

how can code and plot the magnitude response and phase?

And how do I find H(2)?

[Star Strider]

Go back to your tf call, post it and all other relevant code, and tell us what ‘j’ is. (It cannot be the imaginary operator, because ‘z’ already includes it.)

Answer 1

[Damien]

Hello Boom,

You have to firstly define your variables z and j. if z is going from 1 to 10, and j is 1 then:

z=1:10;
j=1;
H(z)=(0.6-z.^-1).*(1+2*z.^-1)./(3-z.^1).*(2-(j*z.^-1));
%
plot(H)
H(2)

When you multiply vectors or matrices, you have to use scalar (.* or ./).

Answer 2

[Madhura]

H(z)=1/z-1

find magnitude