Re: Multidimensional matrix

[Carlo de Falco]

On 5 Nov 2009, at 10:35, Alberto Frigerio wrote:

> Hi everyone, I've some questions about multidimensional matrix.
>
> *) It is possible to create (maybe using a list) a multidimensional  
> matrix
> A, i.e. every element of A is not a number but a couple, triplet,  
> etc. of
> numbers ?
you could use a multi-index matrix

A = rand (2,4,5);
A (:,2,4)

or a cell-array of matrices

for ii=1:4
for jj=1:5
A{ii,jj} = rand(3,1);
endfor
endfor

A {2,4}

> *) How can I multiply two multidimensional matrices ?

in the second case you could use
cellfun (@(x,y) (x'*y), A, A, 'UniformOutput', false)

> Thanks everybody,
>   Alberto
c.