怎样用matlab做出一元线性回归图形x值分别为1656,2122,2864,4033,6099.y值为2112,2170,2291,2456,2759最好写出编程语言给出编完后的图形,感激不尽了
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![怎样用matlab做出一元线性回归图形x值分别为1656,2122,2864,4033,6099.y值为2112,2170,2291,2456,2759最好写出编程语言给出编完后的图形,感激不尽了](/uploads/image/z/6112518-6-8.jpg?t=%E6%80%8E%E6%A0%B7%E7%94%A8matlab%E5%81%9A%E5%87%BA%E4%B8%80%E5%85%83%E7%BA%BF%E6%80%A7%E5%9B%9E%E5%BD%92%E5%9B%BE%E5%BD%A2x%E5%80%BC%E5%88%86%E5%88%AB%E4%B8%BA1656%2C2122%2C2864%2C4033%2C6099.y%E5%80%BC%E4%B8%BA2112%2C2170%2C2291%2C2456%2C2759%E6%9C%80%E5%A5%BD%E5%86%99%E5%87%BA%E7%BC%96%E7%A8%8B%E8%AF%AD%E8%A8%80%E7%BB%99%E5%87%BA%E7%BC%96%E5%AE%8C%E5%90%8E%E7%9A%84%E5%9B%BE%E5%BD%A2%2C%E6%84%9F%E6%BF%80%E4%B8%8D%E5%B0%BD%E4%BA%86)
怎样用matlab做出一元线性回归图形x值分别为1656,2122,2864,4033,6099.y值为2112,2170,2291,2456,2759最好写出编程语言给出编完后的图形,感激不尽了
怎样用matlab做出一元线性回归图形
x值分别为1656,2122,2864,4033,6099.y值为2112,2170,2291,2456,2759最好写出编程语言给出编完后的图形,感激不尽了
怎样用matlab做出一元线性回归图形x值分别为1656,2122,2864,4033,6099.y值为2112,2170,2291,2456,2759最好写出编程语言给出编完后的图形,感激不尽了
>> clear
>> x=[1656,2122,2864,4033,6099];
>> y=[2112,2170,2291,2456,2759];
>> [P,S]=polyfit(x,y,1)
%P为拟合回归系数即y=P(1)*x+p(2)
P =
1.0e+003 *
0.0001 1.8666
S =
R:[2x2 double]
df:3
normr:9.4223
>> [Y,delta]=polyconf(P,x,S)
%给出回归Y的95%的置信区间为[Y-delta,Y+delta]
Y =
1.0e+003 *
2.1090 2.1772 2.2858 2.4569 2.7592
delta =
20.6907 19.8923 19.1147 19.2502 23.2005
>> x1=1600:100:6100;
>> f=polyval(P,x1);
>> plot(x,y,'ro',x1,f,'-')%绘图查看拟合效果
>> hold on
>> plot(x,Y+delta,'*g')
>> plot(x,Y-delta,'*g')%给出拟合的置信区间
希望我的回答能帮助你!