From help-octave-request at bevo dot che dot wisc dot edu Fri Jan 25 08:07:21 2002
Subject: Re: rlocus
From: David Eduardo Gomez Noguera <davidgn at servidor dot unam dot mx>
To: help-octave at bevo dot che dot wisc dot edu
Date: Fri, 25 Jan 2002 08:21:53 -0600

On Fri, 25 Jan 2002 00:29:06 -0500
Torsten Howard <torsten at inetw dot net> wrote:

Not a straight answer, but run the demo that comes with it:

"sysrepdemo"

( i havent though)
> Hello,
> 
> I went and tried to do a simple rlocus this evening, but it wasn't simple.
> 
> I'll put a transcipt at the end of the page, how do I make this work?
> 
> Torsten
> 
> 
> ---------------------------------------------------------------------
> octave:1> num = [1];
> octave:2> den = [1 6 11 6];
> octave:3> rlocus(num,den)
> error: Asys must be a system data structure (see ss2sys, tf2sys, zp2sys)
> error: evaluating if command near line 45, column 3
> error: called from `sys2tf' in file `/opt/octave/share/octave/2.1.35/m/control/system/sys2tf.m'
> error: called from `rlocus' in file `/opt/octave/share/octave/2.1.35/m/control/base/rlocus.m'
> octave:3> help rlocus
> rlocus is the user-defined function from the file
> /opt/octave/share/octave/2.1.35/m/control/base/rlocus.m
> 
>  - Function File:  rlocus (INPUTS)
>      [rldata, k] = rlocus(sys[,increment,min_k,max_k])
>      Displays root locus plot of the specified SISO system.
>      
>             -----   ---     --------
>         --->| + |---|k|---->| SISO |----------->
>             -----   ---     --------        |
>             - ^                             |
>               |_____________________________|
>      
>      inputs: sys = system data structure
>      min_k, max_k,increment: minimum, maximum values of k and
>      the increment used in computing gain values
>      Outputs: plots the root locus to the screen.
>      rldata: Data points plotted column 1: real values, column 2: imaginary
>      values)
>      k: gains for real axis break points.
> 
> 
> 
> Additional help for built-in functions, operators, and variables
> is available in the on-line version of the manual.  Use the command
> `help -i <topic>' to search the manual index.
> 
> Help and information about Octave is also available on the WWW
> at http://www.che.wisc.edu/octave/octave.html and via the
> help-octave at bevo dot che dot wisc dot edu mailing list.
> octave:4> help sys
> 
> help: sorry, `sys' is not documented
> 
> Additional help for built-in functions, operators, and variables
> is available in the on-line version of the manual.  Use the command
> `help -i <topic>' to search the manual index.
> 
> Help and information about Octave is also available on the WWW
> at http://www.che.wisc.edu/octave/octave.html and via the
> help-octave at bevo dot che dot wisc dot edu mailing list.
> octave:5> 
> 
> 
> 
> -------------------------------------------------------------
> Octave is freely available under the terms of the GNU GPL.
> 
> Octave's home on the web:  http://www.octave.org
> How to fund new projects:  http://www.octave.org/funding.html
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Octave is freely available under the terms of the GNU GPL.

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