用matlab编辑公式,如图,k=1,2,3...200,用rand命令产生N个随机数,x1,x2,...,xN,

用matlab编辑公式,如图,k=1,2,3...200,用rand命令产生N个随机数,x1,x2,...,xN,


μ是样本均值,N=100,000,画出Cs（k）的图像来

clear all
clc
K=200;
N=100000;
x=rand(1,N);
mu=mean(x);%%在0.5上下波动
for k=1:K
for i=1:N-k
cs0(i)= (x(i)-mu)*(x(i+k)-mu);
end
cs(k)=sum(cs0)/(N-k-1);
end
figure(1);plot(cs);