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RE: bode not working: sys undefined
From: |
John W. Eaton |
Subject: |
RE: bode not working: sys undefined |
Date: |
Sat, 10 Oct 2009 12:16:29 -0400 |
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