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hjy2940

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[ÇóÖú] Matlab±à³ÌÇóÄâºÏ²ÎÊý

×î½üÓÃlsqcurvefitÓÃÒÑÖªº¯ÊýÈ¥ÄâºÏʵÑé½á¹ûÇóº¯ÊýÖеÄϵÊý£¬µ«ÊÇÓÃÄâºÏ³öµÄϵÊýÈ¥¼ÆËãµÄÀíÂÛÖµ¸úʵÑéÖµÏà²îºÜ´ó£¬ËùÒÔÏëÇëÎʽøÒ»²½µÄ³ÌÐòÉè¼Æ¡£´óÖ¹ý³ÌÈçÏ£º
1) function F = myfun(x,lamda)
a=x(1);
b=x(2);
c=x(3);
d=x(4);
e=x(5);
t=x(6);
F=...£»
end
2)
options = optimset('Algorithm',{'levenberg-marquardt',.005});
[a b c d e t]=lsqcurvefit(@myfun,[1 -1 -0.1 1 -1 1000],lamda,R,[],[],options)

ºóÃæÓ¦¸ÃÔõôÓÃif else±à³Ì²Åʹ R(calulation)ÓëR(exprimental)Ïà½üÄØ£¿±ÈÈçʹ sum((R(i)-Rcal(i))^2)×îС»¯ÓÅ»¯¡£±¾ÈËÒ²ÊdzÌÐò䣬Íû´ó¼Ò¶¦Á¦ÏàÖú£¬
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