RE: bode not working: sys undefined

[John W. Eaton]

On 10-Oct-2009, Uwe Dippel wrote:

| > Here is an example:
| >
| >
| > n=6
| > d=[1 2 6]
| > sys=tf(n,d);
| > sysout(sys)
| > bode(sys)
| 
| The same goes on ...:
| octave:1> n=6
| n =  6
| octave:2> d=[1 2 6]
| d =
| 
|    1   2   6
| 
| octave:3> sys=tf(n,d);
| error: `tf' undefined near line 3 column 5
| 
| (I would really like to understand what is going wrong here, seemingly 
| all the time!)

What version of Octave are you using?  The control system tools were
removed to a separate package in Octave 3.2.  Probably you need to
install that.  You can find the control package at octave.sf.net.
Some binary distributions of Octave also contain pre-built packages
(for example, if you are using Debian, you can install the
octave-control package with apt-get).

jwe