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Topic: Multi-dimensional array product
Replies: 5   Last Post: Nov 15, 2012 8:23 AM

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Matt

Posts: 1,141
Registered: 1/28/09
Re: Multi-dimensional array product
Posted: Aug 17, 2009 3:25 AM
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Ed Stein7997 <EdStein7997@hushmail.com> wrote in message <h6a80g$i1d$1@news.eternal-september.org>...
> I have a question about how to efficiently form multi-dimensional arrays.
>
> Lets say I have two 2-d arrays (i.e. matrices) a and b; a(i,j) sized
> i=1..M,j=1..N; and b(i,j) sized i=1..K,j=1..L.
>
> How can I form the 4-d array w(m,n,k,l)=a(m,n)*b(k,l) which has a unique
> entry for every m,n,k,l; i.e. there are M*N*K*L unique entries?


w=reshape(a(:)*b(:).', M,N,K,L);



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