From help-octave-request at bevo dot che dot wisc dot edu Tue Jul 16 07:35:40 2002
Subject: Re: matrix with 3 indices
From: Yoel Callev <callevyo at post dot tau dot ac dot il>
To: help-octave at bevo dot che dot wisc dot edu
Date: Tue, 16 Jul 2002 15:33:48 +0300


scherer wrote:

>Dear Sir
>I am using OCTAVE as a programming language in a course on computational
>
>methos of Physics. At the moment I am teaching molecular dynamics: on a
>rectangular
>lattice of cells I need two indices to specify each cell and a third
>index to enumerate
>the atoms in the cell. In MATLAB I would simply create a matrix A with
>elements
>A(i, j, k), but this feature is apparently not suported by OCTAVE. Is
>there an alternative?
>Thanks for your answer.
>Claudio Scherer
>
You can use cells: A{k}(i,j).
This way different cells (k's) can contain matrices of different sizes, 
and these matrices can still be multiplied.

You can allocate such arrays with cell(size), and read about it on the 
MATLAB help under 'cell arrays', athough I havn't found any reference in 
Octave's  help file, this feature does exists in Octave.

	 -Yoel Callev (femto.tau.ac.il/~yoel)





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