f(x) = a*x+b
使用最靠近的兩個點(30,0.629) (40, 0.2754)
求多項式，解a b。
30*a + b = 0.629
40*a + b = 0.2754
a = -0.03536
b = 1.6898
Last active
June 14, 2017 05:47
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| function c = curvefit(x, y) | |
| u = x.*y; | |
| v = [x ones(size(x))]; | |
| coef = inv(v'*v)*v'*u; | |
| c(1) = coef(2); | |
| c(2) = coef(1); | |
| c = c'; | |
| end |
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