function M = simmx(A,B)% M = simmx(A,B)%    calculate a sim matrix between specgram-like feature matrices A and B.%    size(M) = [size(A,2) size(B,2)]; A and B have same #rows.% 2003-03-15 dpwe@ee.columbia.eduEA = sqrt(sum(A.^2));EB = sqrt(sum(B.^2));%ncA = size(A,2);%ncB = size(B,2);%M = zeros(ncA, ncB);%for i = 1:ncA%  for j = 1:ncB%    % normalized inner product i.e. cos(angle between vectors)%    M(i,j) = (A(:,i)'*B(:,j))/(EA(i)*EB(j));%  end%end% this is 10x fasterM = (A'*B)./(EA'*EB);