求助1stopt 的共享模式拟合问题。
ConstStr a0,a1,b1,a2,b2;
SharedModel;
Variable x,y1,y2;
Function y1=a0+a1*x^2/(x^2+b1^2)+a2*x^2/(x^2+b2^2);
y2=(a1*b1*x/(x^2+b1^2)+a2*b2*x/(x^2+b2^2))/(a0+a1*x^2/(x^2+b1^2)+a2*x^2/(x^2+b2^2));
Data;
0.1 1.31709800000000 0.164705000000000
0.2 1.39647900000000 0.179305000000000
0.5 1.52278700000000 0.199679000000000
1 1.63735200000000 0.224308000000000
1.5 1.71204500000000 0.243151000000000
2 1.77026100000000 0.259509000000000
3 1.86104900000000 0.287757000000000
5 1.99418300000000 0.333461000000000
10 2.22303900000000 0.416220000000000
15 2.39251200000000 0.475165000000000
20 2.53157300000000 0.520452000000000
25 2.65174800000000 0.557732000000000
30 2.76107400000000 0.586729000000000
35 2.85672600000000 0.611156000000000
40 2.93869200000000 0.632225000000000
45 3.01153800000000 0.650770000000000
50 3.07732200000000 0.669588000000000 返回小木虫查看更多
均方差(RMSE): 0.0724217088440325
残差平方和(SSE): 0.178326733004254
相关系数(R): 0.979764907429329
相关系数之平方(R^2): 0.959939273830002
修正R平方(Adj. R^2): 0.950853268397464
确定系数(DC): 0.923382186395899
F统计(F-Statistic): 169.194196086556
参数 最佳估算
-------------------- -------------
a0 1.44927001031294
a1 0.907909531072271
b1 3.17455178762207
a2 6.6004559968534
b2 130.765240733074
能不能再拟合一次,我想看看两次结果的差距
结果都一样的
均方差(RMSE): 0.0724217088440325
残差平方和(SSE): 0.178326733004254
相关系数(R): 0.999037798618252
相关系数之平方(R^2): 0.998076523068004
决定系数(DC): 0.998076226882012
F统计(F-Statistic): 7783.37790122739
参数 最佳估算
-------------------- -------------
a0 1.449270011
a1 6.600455991
b1 130.7652406
a2 0.907909531
b2 3.174551782
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