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maitian9875

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[ÇóÖú] Çó¼ÆËãAICµÄ³ÌÐò

¸÷λ´óÏÀ£¬±¾ÈËÊÖÖÐÓм¸×éÄ£Ð͵ÄÔ¤²âÊý¾Ý£¬Ã¿Ò»×éÖÐÓÐʵÑéÖµºÍÔ¤²âÖµ¡£ÏÖÏëͨ¹ýAICµÄ¼ÆËãÀ´¿´¿´Õ⼸×éÄ£Ð͵ÄÔ¤²âЧ¹û¡£µ«ÊÇСµÜ²ÅÊèѧdz£¬²»»áÓÃMatlab±àAIC¼ÆËã³ÌÐò¡£Ï£ÍûÄÄλ´óÏÀ°ïÎÒ±àÒ»¸öMatlab¼ÆËãAICµÄ³ÌÐò¡£Ö®Ç°Ò²±à¹ý£¬µ«ÊÇ·¢ÏÖÕâ¸öAICËænÖµÔö´ó¶øÔö´ó£¬²»ÊÕÁ²£¬¹À¼ÆÊÇ²Ð²îÆ½·½ºÍ£¨RSS£©¼ÆËã´íÎó¡£ÇóÖ¸µã°¡£¡£¡£¡¡¾¸½£ºÖ®Ç°±àµÄMatlab³ÌÐò¡¿
function AIC=SEP1
RSS=0;
int m;
int n;
K=5;
A=xlsread('114.xls');
[m,n]=size(A);
if m>=200;
    for  i=1:m;
        b(i)=(A(i,1)-A(i,2))/(A(i,2));
        RSS=RSS+b(i)^2;
    end
    AIC=2*K+m*log(RSS/m);
else
    for  i=1:m;
        b(i)=A(i,1)-A(i,2);
        RSS=RSS+b(i)^2;
    end
    AIC=2*K+m*log(RSS/m)+2*K*(K+1)/(m-K-1);
end

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