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Re: Efficiently computing large numbers of vector norms
Posted:
Nov 8, 2012 7:55 AM
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"Harry Commin" wrote in message <k7elhj$as1$1@newscl01ah.mathworks.com>...
> for j = 1:Q2
> Z(:,j) = sum(abs(kron(A1,A2(:,j))'*X2).^2,2);
> end
>
This intermediate result
kron(A1,A2(:,j))'*X2
can be better computed using kronecker's property. See when Matt pickup this thread.
Bruno
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