Re: Assigning matrices to structures and indexing

[SITI HAJAR A BAKAR]

Thanks heaps , it worked! mY was that the sizes of the matrices I was 
expecting as a result of ss2tf would not fit in the structure I wa 
assigning them too, if that makes sense. I had to initally specify the 
size of the structure for which the resultant matrices would fit in. 
Thanks again!

Regards,
Siti HAjar BAkar

----- Original Message -----
From: Tom Holroyd <address@hidden>
Date: Friday, May 27, 2005 9:28 pm
Subject: Re: Assigning matrices to structures and indexing

> > I'm having trouble implementing the following
> > lines in Octave 2.1.70 in Windows). They work in MATLAB .
> >
> > [G.B(k,:,m),G.A(k,:,m)] = 
> ss2tf(G.ss.A,G.ss.B,G.ss.C(m,:),G.ss.D(m,:),k);
> Or to put it more simply,
> 
> octave:7> A(1,:,2) = 4
> A =
> 
> ans(:,:,1) = 0
> ans(:,:,2) = 4
> 
> octave:8> A(1,:,2) = [4,5]
> error: A(IDX-LIST) = X: X must be a scalar or size of X must 
> equal number of elements indexed by IDX-LIST
> error: assignment failed, or no method for `matrix = matrix'
> error: evaluating assignment expression near line 8, column 10
> 
> If you preallocate the array it'll work:
> 
> octave:8> B = zeros(1,2,2);
> octave:9> B(1,:,2) = [4,5]
> B =
> 
> ans(:,:,1) =
> 
>   0  0
> 
> ans(:,:,2) =
> 
>   4  5
> 
> 
> Dr. Tom Holroyd
> "A man of genius makes no mistakes. His errors are volitional and
> are the portals of discovery." -- James Joyce
> 
> 
> 
> -------------------------------------------------------------
> 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
> Subscription information:  http://www.octave.org/archive.html
> -------------------------------------------------------------
> 
> 



-------------------------------------------------------------
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
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------