function d = histCmpChi2(h1, h2)% Compare two histograms using chi-squared% function d = histCmpChi2(h1, h2)%% d(i,j) = chi^2(h1(i,:), h2(j,:)) = sum_b  (h1(b[N B] = size(h1);d = zeros(N,N);for i=1:N  hh1 = repmat(h1(i,:), N, 1);  numer = (hh1 .- h2).^2;