clc
close
num=46000;
step=23000;
n=num/step;
arr=randn(num,1) * 8.239027791394347 + 70;
std(arr)
mean(arr)
arr_s=sort(arr);
s=zeros(step,n);
std_arr=zeros(step,1);
mean_arr=zeros(step,1);
for i=1:n
a=(i-1)*step +1;
b=i*step;
s(:,i)=arr_s(a:b);
std_arr(i)=std(s(:,i));
mean_arr(i)=mean(s(:,i));
end
grid on
subplot(2,1,1)
plot(mean_arr)
subplot(2,1,2)
plot(std_arr)
View Code
标签：std,正太,arr,方差,step,num,标准差,zeros,mean From： https://www.cnblogs.com/wdfrog/p/17297922.html