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view general/numerical/matrix/qforma.m @ 61:eff6bddf82e3 tip

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Finally implemented perceptual brightness thing.
author samer
date Sun, 11 Oct 2015 10:20:42 +0100
parents db7f4afd27c5
children
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function z=qforma(A,u), z=sum(u.*(A*u));
% qforma - Quadratic form (array version) qforma(A,x)=diag(x'*A*x)
%
% qforma :: [[N,N]], [[N,T]] -> [[1,T]].