MATLAB拟合 - 奋斗牛小二

http://yinfulin2008.blog.163.com/blog/static/37961257200932553944288/

 

>> x=10:100; 
>> y=[0.067,0.143,0.231,0.308,0.374]; 
>> p=polyfit(x,y,1); 
>> xx=0:20:100; 
>> plot(x,y,\'o\',xx,polyval(p,xx)) 
>> poly2sym(p,\'x\')

ans =

779/4000*x-5245792845961277/576460752303423488

>> vpa(ans,8)

ans =

.19475000*x-.91000000e-2

即y=0.19475x-0.0091