Re: rlocus

[David Eduardo Gomez Noguera]

On Fri, 25 Jan 2002 02:05:55 -0600
"John W. Eaton" <address@hidden> wrote:

> On 25-Jan-2002, Torsten Howard <address@hidden> wrote:
> 
> | 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?
> | 
> | 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)
> 
> If you expect your num and den to describe a transfer function of the
> form
> 
>              1
>     --------------------------
>     1*s^3 + 6*s^2 + 11*s^1 + 6
> 
> try
> 
>   rlocus (tf2sys (num, den))
> 

sorry to bother here, but rlocus should return the plotted values for each k?
the manpage says [rldata,k], but when i execute rlocus, i get

num = 1
den =

   1  11  10   0

ans = [](0x0)

I wanted to do this to change the plot, as to use other colors and other 
background, and connect so many dots with lines.

Or is there other way to do it?

also, help page says [rldata,k], but its declared like
[rldata, k_break, rlpol, gvec, real_ax_pts] = rlocus

any help would be appreciated.
> 
> jwe
> 
> 
> 
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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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