在MATLAB中轻松实现1stopt插件的拟合功能指南
[/size][/backcolor][/color][color=#999999][size=12px]Title "HN+conduction";
conststr m=coef1/(8.854e-12*(2*pi*f[i]))+coef2*(1+2*(2*pi*f[i]*coef3)^coef4*cos(pi*coef4/2)+(2*pi*f[i]*coef3)^(2*coef4))^(-coef5/2)*sin(coef5*atan(sin(pi*coef4/2)/((2*pi*f[i]*coef3)^(-coef4)+cos(pi*coef4/2))))+coef6*(1+2*(2*pi*f[i]*coef7)^coef8*cos(pi*coef8/2)+(2*pi*f[i]*coef7)^(2*coef8))^(-coef9/2)*sin(coef9*atan(sin(pi*coef8/2)/((2*pi*f[i]*coef7)^(-coef8)+cos(pi*coef8/2))))+coef10*(1+2*(2*pi*f[i]*coef11)^coef12*cos(pi*coef12/2)+(2*pi*f[i]*coef11)^(2*coef12))^(-coef13/2)*sin(coef13*atan(sin(pi*coef12/2)/((2*pi*f[i]*coef11)^(-coef12)+cos(pi*coef12/2))));
conststr n=coef14+coef2*(1+2*(2*pi*f[i]*coef3)^coef4*cos(pi*coef4/2)+(2*pi*f[i]*coef3)^(2*coef4))^(-coef5/2)*cos(coef5*atan(sin(pi*coef4/2)/((2*pi*f[i]*coef3)^(-coef4)+cos(pi*coef4/2))))+coef6*(1+2*(2*pi*f[i]*coef7)^coef8*cos(pi*coef8/2)+(2*pi*f[i]*coef7)^(2*coef8))^(-coef9/2)*cos(coef9*atan(sin(pi*coef8/2)/((2*pi*f[i]*coef7)^(-coef8)+cos(pi*coef8/2))))+coef10*(1+2*(2*pi*f[i]*coef11)^coef12*cos(pi*coef12/2)+(2*pi*f[i]*coef11)^(2*coef12))^(-coef13/2)*cos(coef13*atan(sin(pi*coef12/2)/((2*pi*f[i]*coef11)^(-coef12)+cos(pi*coef12/2))));
parameter coef1[0,1e-6],coef2[0,],coef3[0,],coef(4:5)[0,1],coef6[0,],coef7[0,],coef(8:9)[0,1],coef10[0,],coef11[0,],coef(12:13)[0,1],coef14[1,6];
dataset;
f,z,y=
1316870 4.08458 0.0745439
877915 4.10417 0.0699963
585277 4.12164 0.0656182
390184 4.1391 0.0610729
260123 4.15614 0.0570099
173415 4.16511 0.0537728
115610 4.17838 0.0505059
77073.5 4.19026 0.0478009
51382.3 4.20109 0.0458983
34254.9 4.21128 0.0456048
22836.6 4.2208 0.0460759
15224.4 4.23002 0.0483265
10149.6 4.23842 0.0531507
6766.4 4.24746 0.0616358
4510.93 4.2571 0.075097
3007.29 4.26871 0.0951371
2004.86 4.28361 0.124274
1336.57 4.30554 0.165683
891.048 4.33961 0.222383
594.032 4.3975 0.295104
396.021 4.49184 0.374629
264.014 4.62959 0.438412
176.01 4.7954 0.459368
117.34 4.95528 0.429212
78.2264 5.0804 0.366628
52.151 5.16686 0.297969
34.7673 5.22457 0.24022
23.1782 5.26515 0.197984
15.4521 5.29995 0.170453
10.3014 5.32933 0.153523
6.86762 5.35758 0.145018
4.57841 5.38568 0.142438
3.05227 5.414 0.14538
2.03485 5.44228 0.153564
1.35657 5.47136 0.169538
0.904377 5.49969 0.193806
0.602918 5.53204 0.233614
0.401946 5.56445 0.287773
0.267964 5.59891 0.368358
0.178642 5.63922 0.488312
0.119095 5.68163 0.654404
0.1 5.70193 0.746381
enddataset;
minfunction sum(i=1:42)(((m-y[i])/y[i])^2+((n-z[i])/z[i])^2);
coef3-coef7<0;
coef7-coef11<0;[/size][/color][color=#999999][backcolor=rgb(242, 242, 242)][size=12px]