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 0.620];
P=polyfit(x,y,1)

P =

0.3879 2.0099

即k=0.3879,b=2.0099

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P=polyfit(x,y,n)表示y是关于x的n阶多项式，P为拟合后的多项式系数