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【单选题】
某种合金,含金属x,则膨胀系数y见表,进行二次多项式拟合。 x 37 38 39 40 41 y 3.4 3 2.1 1.53 1.8A.
x=[37 38 39 40 41]; y=[3.4 3 2.1 1.53 1.8]; polyval(x,y,2)
B.
x=[37 38 39 40 41]; y=[3.4 3 2.1 1.53 1.8]; polyfit(x,y,2)
C.
x=[37 38 39 40 41]; y=[3.4 3 2.1 1.53 1.8]; poly(x,y,2)
D.
x=[37 38 39 40 41]; y=[3.4 3 2.1 1.53 1.8]; polyder(x,y,2)
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