Re: Google's "summer of code"

[A S Hodel]

Mr. Villegas is correct in part.  The octave control systems toolbox  
was written and released a year ahead of MATLAB's current control  
toolbox format.  We (octave) adopted a quasi-object-oriented approach  
to simplify the interface functions.  However, since cell arrays were  
not a part of Octave at the time (1996-ish), we did not develop code  
for MIMO transfer function/zpk formats. As Mr Rogers writes, the  
state-space form is all that we have available currently.

However, bode plots of individual channels of MIMO systems are  
available in Octave's bode, nyquist, and nichols plot functions.  See  
the help documentation for further details.  Unfortunately, due to  
the multiplot behavior of gnuplot, the "print" command cannot be  
directly used to save these plots.  They must instead be plotted  
individually before using the octave-forge print command to save them.

On May 4, 2006, at 3:41 AM, Raymond E. Rogers wrote:

> Carlos,
> 	 I may not know what you are talking about; but there is a state- 
> variable toolbox that works very
> well.  The only extended MIMO formalism I know of is State-Variable.
>
> Ray
>
>
> Carlos Villegas wrote:
> > Hi, I work with control system theory in matlab normally and I'm  
> > trying
> > to migrate to octave. I've found that the transfer functions  
> > cannot be
> > multi-dimensional (e.g. 2-input 3-output) and by result no bode  
> > plots,
> > stepplots or similar can be obtained. I was wondering if an  
> > acceptable
> > project could be taken out of this and if somebody would be  
> > interested
> > in mentoring.
> >
> > best regards,
> >
> > Carlos Villegas
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://www.cae.wisc.edu/mailman/listinfo/help-octave
>
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A S Hodel http://homepage.mac.com/hodelas
address@hidden