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发表于 2012-12-18 13:23:58
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表格算法代码,有兴趣的看下:
clear all;
levelpoint=[0 0 0 3 7 13 19];
getpoint=zeros(6,7);
chance=zeros(6,7);
expect=zeros(1,6);
expect2=zeros(1,6);
s2=zeros(1,6);
for i=1:6
for j=1:7
if j>=i
getpoint(i,j)=levelpoint(j)-levelpoint(i);
chance(i,j)=nchoosek(7-i,j-i)*power(5,7-j)/power(6,7-i);
expect(i)=expect(i)+getpoint(i,j)*chance(i,j);
expect2(i)=expect2(i)+getpoint(i,j)*getpoint(i,j)*chance(i,j);
end
end
s2(i)=expect2(i)-expect(i)*expect(i);
end
getpoint
chance
expect
expect2
s2
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