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yxn2012

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x=1:0.01:8;
>> y1=normpdf(x,2.42,0.16);
>> plot(x,y1);
>> y2=normpdf(x,5.44,0.8);
>> figure(2);plot(x,y1,x,y2,':')
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xiuyouxu

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2Â¥2012-03-05 17:40:16
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xiangqianzsh

ľ³æ (ÖøÃûдÊÖ)

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¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Éè x~Norm(u1,sigma1)   ÃܶȺ¯ÊýΪ  f£¨x£©£¬
Éèy~Norm(u2,sigma2)  ÃܶȺ¯ÊýΪ g£¨y£©
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ÔòÃæ»ý=int(f(x),x=x0µ½ÕýÎÞÇî)+int£¨g£¨y£©£¬yµÈÓÚ¸ºÎÞÇîµ½x0£©


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3Â¥2012-03-05 18:32:44
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yxn2012

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ÒýÓûØÌû:
Â¥: Originally posted by xiuyouxu at 2012-03-05 17:40:16:
¼ÈÈ»¿ÉÒÔ»­³öͼ£¬ÄÇôÕý̬·Ö²¼µÄ²ÎÊý¿ÉÒÔÈ·¶¨£¬ÄÇôÁ½¸öº¯ÊýÖµÀïÈ¡×îС£¬È»ºóÔÚÕû¸öxÖáÉÏ»ý·Ö£¬¾ÍÊÇËùÇóµÄÃæ»ý£¬Õâ¸öÐèҪȷ¶¨Á½ÌõÇúÏߵĽ¹µã£¬È»ºó¿ÉÒÔ²éÕý̬·Ö²¼±íµÃµ½¡£

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4Â¥2012-03-05 20:12:38
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yxn2012

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ÒýÓûØÌû:
Â¥: Originally posted by xiangqianzsh at 2012-03-05 18:32:44:
Éè x~Norm(u1,sigma1)   ÃܶȺ¯ÊýΪ  f£¨x£©£¬
Éèy~Norm(u2,sigma2)  ÃܶȺ¯ÊýΪ g£¨y£©
Á½¸öº¯Êý¶¼ÓÐÁË£¬Éè½»µãΪ x0£¬
ÔòÃæ»ý=int(f(x),x=x0µ½ÕýÎÞÇî)+int£¨g£¨y£©£¬yµÈÓÚ¸ºÎÞÇîµ½x0£©


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5Â¥2012-03-05 20:18:34
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yxn2012

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Äܸø³ö¾ßÌå±à³ÌÂ𣬱à³ÌÎÒÒ»Çϲ»Í¨°¡£¡
6Â¥2012-03-05 20:26:42
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sapyren

Òø³æ (СÓÐÃûÆø)

ȷʵÊǸöÄÑÌâÒ®£¬Èí¼þÒ²Óв»ÖÇÄܵÄʱºò...ºÇºÇ
×ö´¿´âµÄ×Ô¼º£¬ÏíÊÜÔðÈÎÓë×ÔÓÉ£¡£¡£¡
7Â¥2012-04-26 20:11:29
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dbb627

ÈÙÓþ°æÖ÷ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
matlab
>> syms x;
>> y1=normpdf(x,2.42,0.16);
>> y2=normpdf(x,5.44,0.8);
>> x0=solve(y1-y2,'x')

x0 =

2753/1200 - (2*(75*log(18062160261735236) - 75*log(3612432052347047) + 570025/1024)^(1/2))/75
(2*(75*log(18062160261735236) - 75*log(3612432052347047) + 570025/1024)^(1/2))/75 + 2753/1200

>> vpa(x0)

ans =

1.6001296481239981032144586507405
2.9882036852093352301188746825928

>> S=int(normpdf(x,2.42,0.16),x,0,1.600)+int(normpdf(x,2.42,0.16),x,2.98820,inf)+int(normpdf(x,5.44,0.8),x,1.600,2.98820);
>> vpa(S)

ans =

0.0012803185422687235392403794943474
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
8Â¥2012-04-26 21:15:13
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

atogle

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