蒙特卡洛方法matlab程序

hattrick110

贴一个蒙特卡洛方法的matlab程序，供大家使用。
祝大家比赛都能取得好成绩


% Example Monte Carlo Simulation in Matlab
. ^: G3 e7 Y) _2 m' i8 a% Function: y = x2^2/x1
%
% l8 a8 @# H" S. @% N  _# g% V- Q% Generate n samples from a normal distribution
# F. f% |4 C) _) P% r = ( randn(n,1) * sd ) + mu
% mu : mean
0 }5 q( y, R& b9 b3 L  V  e: d& F% sd : standard deviation
4 v, S1 s4 Y+ h- T* u5 Q%
% Generate n samples from a uniform distribution
% r = a + rand(n,1) * (b-a)
% a : minimum
% b : maximum
. g& N. B1 x7 p, u3 {. Z* }7 \n = 100000; % The number of function evaluations
* |+ u" Q# P" B( q! g# x% --- Generate vectors of random inputs
$ X1 l! d. Y7 A/ ?' t; e% x1 ~ Normal distribution N(mean=100,sd=5)
% x2 ~ Uniform distribution U(a=5,b=15)
x1 = ( randn(n,1) * 5 ) + 100;
( @. z7 U3 _% W2 j6 g1 yx2 = 5 + rand(n,1) * ( 15 - 5 );
% C+ R6 I* X7 a" M4 j% --- Run the simulation
% Note the use of element-wise multiplication
y = x2.^2 ./ x1;
5 G: i" d* \! X1 t1 R* L% --- Create a histogram of the results (50 bins)
hist(y,50);
4 V( ?& ^0 f% A5 Q. f; D& K% --- Calculate summary statistics
+ V3 N# p/ [% `* r- T7 f2 @9 Ky_mean = mean(y)
y_std = std(y)
. c; r. J  @; Sy_median = median(y)

mma

多谢拉！！！！！！！

sjtucat5

thankyouverymuch

tzhggx

顶啊！不错啊！

BigTou

谢谢啦...................

rever99

个盲目反卷积程序是用模拟退火法做的，想请教

jafy2009

哈哈哈。。。谢谢！！！

eyehappy

thank you!!!!

cherry_s1218

看看。。。。。。

shuxinjian24134

xinga!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!