RE: bode not working: sys undefined

[Uwe Dippel]

> It looks like you didnt define the "sys" in the bode command. You can try to 
> read here:
>
> http://www.obihiro.ac.jp/~suzukim/masuda/octave/html/octave_127.html#SEC192
>
> Look at the "State space system interface functions" for example.
>
> Good luck.

From that link:

> Example
>         
>
> octave:1> a = [1 2 3; 4 5 6; 7 8 10];
> octave:2> b = [0 0 ; 0 1 ; 1 0];
> octave:3> c = eye (3);
> octave:4> sys = ss (a, b, c, [], 0, 3, 0, {"volts", "amps", "joules"});
> octave:5> sysout(sys);
> Input(s)
>         1: u_1
>         2: u_2
[....]

What I get, is the same thing as before:

octave:1> a = [1 2 3; 4 5 6; 7 8 10];
octave:2> b = [0 0 ; 0 1 ; 1 0];
octave:3> c = eye (3);
octave:4> sys = ss (a, b, c, [], 0, 3, 0, {"volts", "amps", "joules"});
error: `ss' undefined near line 4 column 7
octave:4>

(I would really like to understand what is going wrong here, seemingly
all the time!)

Uwe