Simone
x=[27560000,55120000,82680000,88192000,110240000,137800000]y=[1743170000,1894750000,2053220000,2067000000,2239250000,2411500000]f=poly2str(polyfit(x,y,3),'陵态渗x')结果 f = -4.3137e-017 x^3 + 2.0416e-008 x^2 + 3.7073 x + 1628401409.4955或者尺脊闭斗f=poly2sym(polyfit(x,y,3),'x')
