Bode plot of the following equation

I am unable to get the bode plot of this equation:

s=tf('s');

U=(8+22/s+32*s)^0.2;

bode(U)

Error:

In the expression "M^K", the exponent K must be a scalar integer.

Answer 1

[Star Strider]

Perhaps:

s=tf('s');
U=(8+22/s+32*s);

[m,p,w] = bode(U);

figure
subplot(2,1,1)
plot(w, 20*log10(squeeze(m).^0.2))
ylabel('|H(\omega)| (dB)')
grid
subplot(2,1,2)
plot(w,unwrap(squeeze(p)))
ylabel('\phi (\circ)')
grid
xlabel('\omega')

[Pradeep Kumar Chaudhary]

Thank u for your reply..but actually I wanted to know if there is any toolbox or method to plot such type of equations directly.

[Star Strider]

My pleasure.

Not to my knowledge.