untitled2.m

这是用牛顿法做的

x=[0 0.2 0.4 0.6 0.8 1.0 1.2];
n=length(x)
y=[0.9 1.9 2.8 3.3 4.0 5.7 6.5];
x1=sum(x)
x2=sum(y)
x3=sum(x.^2)
x4=sum(x.*y)
xi=[n x1;x1 x3]
yi=[x2;x4]
a=xi\yi