function y = delay(x,n)% y = delay(x,n=1) Delay signal x by n samplesif nargin < 2    n = 1;endnx = length(x);if nx <= n    y = zeros(size(x));else    if size(x,1) > size(x,2)	y = [zeros(n,1); x(1:nx-n)];    else	y = [zeros(1,n) x(1:nx-n)];    endend