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QiChyi

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[ÇóÖú] ÇóÖúMatlab lsqcurveº¯ÊýÇúÏßÄâºÏ

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×ÜÊÇÌáʾ´íÎó£ºOptimization terminated: norm of the current step is less than OPTIONS.TolX.
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w=2*pi*[0.00099 0.001 0.002 0.004 0.010 0.021544 0.0464 0.100 0.2154 0.4641 1 2.154 4.64 10 20 40 70 110 222 446 1000];
ydata=[5.5981 5.5924 5.3308 5.2180 5.1315 5.0785 5.0289 5 5.1115 5.0825 5.0579 5.0401 5.0175 5.0271 5.0151 5.005 5.0002 4.9950 4.9906 4.9862 4.9875];
ep0=[3.3 0.1 -4.8 4 7e-4 5e-11 0.68 0.78 5];

ept=inline('ep(1)*w.^(-ep(2))+real(ep(3)./(1+(j*w*ep(5)).^(1-ep(7)))+ep(4)./(1+(j*w*ep(6)).^(1-ep(8))))+ep(9)','ep','w');
ep=lsqcurvefit(ept,ep0,w,ydata);
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mycastle

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jjdg(½ð±Ò+1): ¸Ðл²ÎÓë 2011-09-08 09:59:52
¿ÉÄÜÊÇOPTIONS.TolXµÄÖµµÄÔ­Òò°É.
TolX - Termination tolerance on X [ positive scalar ]
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2Â¥2011-09-08 00:35:23
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mycastle

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jjdg(½ð±Ò+1): ¸Ðл²ÎÓë 2011-09-08 09:59:59
QiChyi(½ð±Ò+5): лл mycastle£¬ÔÙ³¢ÊÔÒ»¹þ 2011-09-08 10:16:24
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3Â¥2011-09-08 00:40:23
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mycastle

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3Â¥: Originally posted by mycastle at 2011-09-08 00:40:23:
¿ÉÒÔÊäÈëoptimsetÃüÁî
ÉèÖÃX toleranceÏĬÈϵÄÊÇ1.0e-6

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