CODEWITHSUNDEEP
octave
Burak
Burak

Reputation: 17

Octave runs but graph not displayed

num=[1];
den=[1 3 1];
G=tf(num,den);
H=1;
T=feedback(G,H);
step(T);
hold on;
Kp=23;
Ki=0;
Kd=0;
C=pid(Kp,Ki,Kd);
T=feedback(C*G,H);
step(T);

When run this script nothing happen in Octave but works fine in octave-online.net

online octave

enter image description here Octave Windows

enter image description here

Upvotes: 2

Views: 782

Answers (1)

Tasos Papastylianou
Tasos Papastylianou

Reputation: 22215

I will put a proper answer here for future users, even though OP has already solved their problem from the comments.

octave-online.net is an excellent cloud service providing an instance of octave on the cloud.

Contrary to a typical installation of octave on linux or windows, the octave-online client autoloads some of the more popular packages, one of which is control.

You can confirm this by typing pkg list in the octave-online console.

In your normal linux / windows installation however, this needs to be loaded explicitly before use, e.g. in the case of the control package, by doing pkg load control.

Your code uses the functions feedback and pid, both of which rely on the control package, therefore in your windows instance, your code failed, because you tried to use these functions without loading the package first.

Presumably there was also an error in your terminal informing you of this fact, that you may have missed.

Upvotes: 1

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