matlab用隐函数拟合的程序怎么编写试验测试得到x,y数据.现在想通过用matlab用隐函数y=I1*exp((x-y*Rs)/0.026/n1)+I2*exp((x-y*Rs)/0.026/n2)+(x-y*Rs)/Rsh-I1-I2+IL对数据进行拟合.得到参量I1、I2、IL、Rs、Rsh、n1、n
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![matlab用隐函数拟合的程序怎么编写试验测试得到x,y数据.现在想通过用matlab用隐函数y=I1*exp((x-y*Rs)/0.026/n1)+I2*exp((x-y*Rs)/0.026/n2)+(x-y*Rs)/Rsh-I1-I2+IL对数据进行拟合.得到参量I1、I2、IL、Rs、Rsh、n1、n](/uploads/image/z/5164334-62-4.jpg?t=matlab%E7%94%A8%E9%9A%90%E5%87%BD%E6%95%B0%E6%8B%9F%E5%90%88%E7%9A%84%E7%A8%8B%E5%BA%8F%E6%80%8E%E4%B9%88%E7%BC%96%E5%86%99%E8%AF%95%E9%AA%8C%E6%B5%8B%E8%AF%95%E5%BE%97%E5%88%B0x%2Cy%E6%95%B0%E6%8D%AE.%E7%8E%B0%E5%9C%A8%E6%83%B3%E9%80%9A%E8%BF%87%E7%94%A8matlab%E7%94%A8%E9%9A%90%E5%87%BD%E6%95%B0y%3DI1%2Aexp%28%28x-y%2ARs%29%2F0.026%2Fn1%29%2BI2%2Aexp%28%28x-y%2ARs%29%2F0.026%2Fn2%29%2B%28x-y%2ARs%29%2FRsh-I1-I2%2BIL%E5%AF%B9%E6%95%B0%E6%8D%AE%E8%BF%9B%E8%A1%8C%E6%8B%9F%E5%90%88.%E5%BE%97%E5%88%B0%E5%8F%82%E9%87%8FI1%E3%80%81I2%E3%80%81IL%E3%80%81Rs%E3%80%81Rsh%E3%80%81n1%E3%80%81n)
matlab用隐函数拟合的程序怎么编写试验测试得到x,y数据.现在想通过用matlab用隐函数y=I1*exp((x-y*Rs)/0.026/n1)+I2*exp((x-y*Rs)/0.026/n2)+(x-y*Rs)/Rsh-I1-I2+IL对数据进行拟合.得到参量I1、I2、IL、Rs、Rsh、n1、n
matlab用隐函数拟合的程序怎么编写
试验测试得到x,y数据.
现在想通过用matlab用隐函数y=I1*exp((x-y*Rs)/0.026/n1)+I2*exp((x-y*Rs)/0.026/n2)+(x-y*Rs)/Rsh-I1-I2+IL对数据进行拟合.得到参量I1、I2、IL、Rs、Rsh、n1、n2的数值.
急
自变量x从0到1,每0.05取一个点.
对应的y值如下:
0,4.84827E-9
0.05,7.20861E-9
0.1,9.486E-9
0.15,1.33346E-8
0.2,1.85467E-8
0.25,2.54804E-8
0.3,3.57885E-8
0.35,4.94846E-8
0.4,6.86021E-8
0.45,9.34068E-8
0.5,1.36416E-7
0.55,2.18504E-7
0.6,4.51033E-7
0.65,1.2785E-6
0.7,4.57114E-6
0.75,1.70904E-5
0.8,5.62476E-5
0.85,1.45646E-4
0.9,2.93975E-4
0.95,4.91251E-4
1,7.21464E-4
y轴用的是指数坐标.
matlab用隐函数拟合的程序怎么编写试验测试得到x,y数据.现在想通过用matlab用隐函数y=I1*exp((x-y*Rs)/0.026/n1)+I2*exp((x-y*Rs)/0.026/n2)+(x-y*Rs)/Rsh-I1-I2+IL对数据进行拟合.得到参量I1、I2、IL、Rs、Rsh、n1、n
clear;clc
F=@(p,x)p(1)*exp((x(:,1)-x(:,2)*p(4))/0.026/p(6))+p(2)*exp((x(:,1)-x(:,2)*p(4))/0.026/p(7))+(x(:,1)-x(:,2)*p(4))/p(5)-p(1)-p(2)+p(3)-x(:,2);
x=[0,4.84827E-9
0.05,7.20861E-9
0.1,9.486E-9
0.15,1.33346E-8
0.2,1.85467E-8
0.25,2.54804E-8
0.3,3.57885E-8
0.35,4.94846E-8
0.4,6.86021E-8
0.45,9.34068E-8
0.5,1.36416E-7
0.55,2.18504E-7
0.6,4.51033E-7
0.65,1.2785E-6
0.7,4.57114E-6
0.75,1.70904E-5
0.8,5.62476E-5
0.85,1.45646E-4
0.9,2.93975E-4
0.95,4.91251E-4
1,7.21464E-4 ];
p0=[3 5 4 10 9 10 4];%%因为你这个函数很变态,初值选择不好得不到好结果,这个初值不错
warning off
p=nlinfit(x,zeros(size(x,1),1),F,p0);
disp('I1、I2、IL、Rs、Rsh、n1、n2分别为:');
disp(num2str(p));
plot(x(:,1),x(:,2),'ro');hold on;
ezplot(@(x,y)F(p,[x,y]),[0,1,-1e-3,1e-3]);
title('曲线拟合');legend('样本点','拟合曲线')