Bode Plot options to graph

Id like to have absolute gain as it generates the plot instead of having to do it manually. I was able to change frequency from rad to hz. not sure about the db to absolute. Thank you

[rockstar49]

Hi,

Is it something that can be done like this?

h = gcr

setoptions(h,'FreqUnits','Hz')

Answer 1

[Chunru]

H = tf([1 0.1 7.5],[1 0.12 9 0 0]);
[mag,phase,wout] = bode(H);
subplot(211); plot(wout, squeeze(mag(1,1,:)))
subplot(212); plot(wout, squeeze(phase(1,1,:)))

figure;
bode(H)

[rockstar49]

HI this solution works as well but is there an option to do it this way

h = gcr

setoptions(h,'FreqUnits','Hz')

etc

[rockstar49]

Please see below, thank you

[Chunru]

H = tf([1 0.1 7.5],[1 0.12 9 0 0]);
[mag,phase,wout] = bode(H);
subplot(211); plot(wout/(2*pi), squeeze(mag(1,1,:)))
subplot(212); plot(wout/(2*pi), squeeze(phase(1,1,:)))
xlabel('f(Hz)')

[rockstar49]

Hi,

Is it something that can be done like this?

h = gcr

setoptions(h,'FreqUnits','Hz')

[Chunru]

No (unless you write your own class for creating the figure and set your own object property). Why do you need to do it that way?

[rockstar49]

It is a property setting on the figure, I can easily change it manually. I did the same thing for the frequency from rad to hz. im sure there is a way to do the same from db to absolute gain

Answer 2

[Paul]

Can be done if using bodeplot instead of bode

H = tf([1 0.1 7.5],[1 0.12 9 0 0]);
h = bodeplot(H);
setoptions(h,'MagUnits','abs','FreqUnits','Hz')