[分享]Matlab中超几何分布作图介绍 [复制链接]

在用Matlab绘制各种常用概率分布的密度函数时，都比较简单，唯独超几何分布试了几次都不成功，输出结果总是 _K'Y`w']  
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        查看了一下帮助  help hygepdf OkISRj'!U  
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HYGEPDF Hypergeometric probability density function. q*Hg-J}  
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    Y = HYGEPDF(X,M,K,N) returns the hypergeometric probability fz|_c*&64  
    density function at X with integer parameters M, K, and N. $dK430_B  
    Note: The density function is zero unless X is an integer. T3SFG]H  
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    The size of Y is the common size of the input arguments. A scalar input   #8M^;4N>[  
    functions as a constant matrix of the same size as the other inputs.     %{:pBt:Z  
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    See also hygecdf, hygeinv, hygernd, hygestat, pdf. 0YfmAF$/B  
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    Reference page in Help browser 8@S]P0lk  
       doc hygepdf rLmc(-q  
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        超几何分布参数较多，这里关于三个参数的指代不详。又在互联网上查了相关资料，包括该函数的定义式： 'o0o.&/=  
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                   http://ccpublic-1.central.cranfield.ac.uk/2001DMSOMFRC/pr062320/Matlab/stats/hygepdf.m '|5o(6u'  
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        直到发现这个例子后才清楚各个参数所代表的具体意义。 6w m-uu  
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Suppose you have a lot of 100 floppy disks and you know that 20 of them are defective. What is the probability of drawing 0 through 5 defective floppy disks if you select 10 at random? ;XjXv'  
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p = hygepdf(0:5,100,20,10) bXXX-Xc  
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p =  0.0951 0.2679 0.3182 0.2092 0.0841 0.0215
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详细可参见： d=uGB"  
http://www.physnet.uni-hamburg.de/physnet/matlab/help/toolbox/stats/hygepdf.html#4257 {TJBB/B1  
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        果然与一般对超几何分布公式字母惯常表示方式有所不同。尝试将上述分布作图如下 ,1~zMzw^  
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x = 0:5 W_Hoa*~  
p = hygepdf(x,100,20,10); .q4$)8[Pg  
plot(x,p,':k*')

学习了 Iu`S0#+  

有没有中文的啊