onewaytodoit.m

一些常被用于教学或者参考的概率论的实例的源代码

%onewaytodoit.m/created by PJNahin for "Duelling Idiots"(2/28/99)
%This m-file plots a histogram of 10,000 random numbers
%that are normally distributed with zero mean and unit variance.
%
%
rand('state',100*sum(clock));      %new seed for generator;
scale=2*pi;
for i=1:2:10000
   u=rand;
   theta=scale*rand;
   factor=sqrt(-2*log(u));
   x1=factor*cos(theta);
   x2=factor*sin(theta);
   y(i)=x1;
   y(i+1)=x2;
end
hist(y,100)                        %plot histogram of y using 100 bins;
title('Histogram of a Normal Random Number Generator')
xlabel('100 bins, 10,000 numbers')
ylabel('number of numbers in each bin')
figure(1)