?? xcorryy.m
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% calculate xcorr across the 1st dimension, gives same result as matlab% bulit-in function, but much much fasterfunction y = xcorryy(x)% x is 2 dimension. calculate xcorr across 1st dimensiony = zeros(size(x));for k = 1:size(x,1) tmp = [zeros(k-1,size(x,2));x]; x2 = tmp(1:size(x,1),:); y(k,:) = sum(x.*x2,1);end
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