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xuezwei

金虫 (小有名气)

[求助] 1stopt非线性拟合问题!

这是我使用1stopt进行非线性拟合的代码,由于第一次使用,执行之后,结果没输出,请高手看看,是代码有问题,还是软件的问题?

//Parameters g1,t1,g2,t2;
//Variable x,y;
//Function y=(g1*t1*x^2/(1+t1^2*x^2)+g2*t2*x^2/(1+t2^2*x^2))/(1-(g1+g2)+g1*t1^2*x^2/(1+t1^2*x^2)+g1*t1^2*x^2/(1+t1^2*x^2));
//1.0>g1>0;
//1.0>g2>0;
//1.0>g1+g2>0;
//t1>0;
//t2>0;
//Data;
//1.790341434 0.455645502
//2.771007873 0.471486636
//4.378981197 0.51354102
//5.39147154  0.522391726
//6.638065811 0.531394971
//10.93562784 0.578792895
//18.01548215 0.63041849
//27.88353212 0.675015186
//40.54613041 0.710521124
//64.07442736 0.747894682
//87.53587727 0.773896256
//132.6950009 0.828642773
//160.0130395 0.800801811
//258.1809053 0.828642773
//407.9993206 0.800801811
//545.9179462 0.800801811
//899.3516573 0.773896256
//1391.975003 0.735223356
//2199.716726 0.686648845
//3334.534617 0.619737523
//5161.038839 0.568986603
//8502.356199 0.504840268
//15542.06002 0.397427473
//29007.56618 0.329325403
//45840.21147 0.287247349
//80380.19427 0.259256186
//127023.5869 0.233992656
//242058.5937 0.197238061
//490972.2096 0.169122103
//808833.4035 0.155272527
//1226104.685 0.140141809
//2019899.306 0.133138686
//5834912.221 0.118128915
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dingd

铁杆木虫 (职业作家)

【答案】应助回帖

感谢参与,应助指数 +1
把每行前面的“//”都去掉。
2楼2012-10-26 14:53:51
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lipenggg

专家顾问 (正式写手)

公式要调整一下:
y*(1-(g1+g2)+g1*t1^2*x^2/(1+t1^2*x^2)+g1*t1^2*x^2/(1+t1^2*x^2))=(g1*t1*x^2/(1+t1^2*x^2)+g2*t2*x^2/(1+t2^2*x^2))
这样能拟合出结果
一团和气
3楼2015-08-06 17:23:44
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