Re: rlocus

[A Scottedward Hodel]

Look at :

tf2sys
zp2sps
ss2sys

and sys2tf
sys2zp
sys2ss

It's not quite as flexible as the object-oriented MATLAB toolbox, but

On 1/25/02 8:21 AM, "David Eduardo Gomez Noguera" <address@hidden>
wrote:

> On Fri, 25 Jan 2002 00:29:06 -0500
> Torsten Howard <address@hidden> 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
>> address@hidden 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
>> address@hidden mailing list.
>> octave:5> 
>> 
>> 
>> 
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> 

--
A. S. Hodel 200 Broun Hall Dept Elect & Comp Eng, Auburn Univ AL 36849-5201
http://www.eng.auburn.edu/~scotte   334 844 1854  Fax: -1809




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