Question

求matlab高手算一组值y=kx+b,求k,b. (-5.64,-0.759) (-3.32,-0.629) (-5.32,-0.620)

最近似的值即可

Answer 1

x=[-5.64 -3.32 -5.32];
y=[-0.759 -0.629 -0.62];
[P,S]=polyfit(x,y,1)

P =

0.0346 -0.5047

S =

R: [2x2 double]
df: 1
normr: 0.0912

>> k=P(1)

k =

0.0346

>> b=P(2)

b =

-0.5047