matlab編程求助誰能幫忙把下圖公式，用matlab編壹下，其中Xi和X都是矩陣，n=25，t=13

t = 13;

n = length(X);

x0 = sum(X)/n;

I = (1:n);

rxt = sum((X - x0).*(I-t))/sqrt(sum((X-x0).^2)*sum((I-t).^2));

end