DEMOcontrol and bodeplots

[John W. Eaton]

On 23-Feb-2004, Hugo Coolens <address@hidden> wrote:

| I'm trying out Octave 2.1.53 on a Quantian Live Linux CD.
| 
| Things are going quite wrong when I do the following:
| DEMOcontrol
| [1] System Representation
| [2] Initialize a system
| [2] Transfer function form
| [1] Continuous time initialization
| Command: num = [5,-1]
| Command: denom =[1,-2, 6]
| Command: sys = tf2sys(num,denom);
| Press a key to execute command  executing
| warning: in /usr/share/octave/2.1.53/m/control/system/__sysdefioname__.m near 
line 47, column 10:
| warning: list objects are deprecated; use cell arrays instead
| panic: Segmentation fault -- stopping myself...
| attempting to save variables to `octave-core'...
| save to `octave-core' complete
| Segmentation fault
| 
| I also have a version 2.1.35 installed on Debian Woody, this works a
| little better but doing the following also goes completely wrong:
| octave:2> sys=tf2sys([3 1],[1 3 1]);
| octave:3> bode(sys)
| error: logspace: arguments must be scalars
| error: evaluating if command near line 71, column 5
| error: evaluating if command near line 68, column 3
| error: called from `logspace' in file
| `/usr/share/octave/2.1.35/m/general/logspace.m'
| error: called from `__bodquist__' in file
| `/usr/share/octave/2.1.35/m/control/base/__bodquist__.m'
| error: called from `bode' in file
| `/usr/share/octave/2.1.35/m/control/base/bode.m'
| 
| Does anybody here on the list how to solve these problems?

Upgrade to 2.1.55.  The demo appears to work properly with that
version.

jwe



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