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

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$ c& h9 K! @9 t8 o* ^1 j; o, P& s% Example Monte Carlo Simulation in Matlab
5 W; ^" {5 |' m: t8 x" g% Function: y = x2^2/x1
& l) D, u) K: s* Y8 n%
/ A1 s4 O. Z% _9 E% Generate n samples from a normal distribution
% r = ( randn(n,1) * sd ) + mu
% mu : mean
% sd : standard deviation
) D* x1 q3 I  t% V. E2 c%
: i5 Q" z) C2 j0 u( O% Generate n samples from a uniform distribution
4 M# J3 \2 x. {" N* t" G" b* a; l" _% r = a + rand(n,1) * (b-a)
; H9 e3 \% i3 H( R9 o3 @$ _- U% a : minimum
% b : maximum
+ R! K$ V( p* J) M7 u9 bn = 100000; % The number of function evaluations
% --- Generate vectors of random inputs
0 H$ I  F' ]3 F* x6 O) A% x1 ~ Normal distribution N(mean=100,sd=5)
% x2 ~ Uniform distribution U(a=5,b=15)
/ s5 e( c9 F" d9 ?5 r* k( Q1 cx1 = ( randn(n,1) * 5 ) + 100;
x2 = 5 + rand(n,1) * ( 15 - 5 );
% --- Run the simulation
5 ]0 }: N/ w8 Z2 ?' s8 I% Note the use of element-wise multiplication
y = x2.^2 ./ x1;
- z+ U  W9 ^' i" f4 Z0 e% --- Create a histogram of the results (50 bins)
hist(y,50);
% --- Calculate summary statistics
y_mean = mean(y)
y_std = std(y)
& q1 m+ c9 Y" ^# I9 V& Hy_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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!