% a1=binornd(1000,0.1,[10,100]);
% a2=binornd(1000,0.2,[10,100]);
% s = a 1+a2;
% p 1 = s-300;
% p2 = p 1/sqrt(250);
x =-2.9:0.1:2.9;
y = randn(10000,1);
圖形(1),歷史(y,x)
n_elements = histc(y,x);
c _ elements = cumsum(n _ elements);
圖(2),bar(x,c _ elements);