matlab根据数据拟合二次曲线拟合二次函数的代码答:32.38,37.99,40.81,43.62,46.45,49.28,52.13,54.88,57.83,60.84,63.57,66.40];a = polyfit(x, y, 2);%进行2次拟合,a是多项式前面的值。a1 = polyval(a, x);%得到拟合后的新值 plot(x,a1,'r');grid on 我试过了,能用,不知道是不是你要的。这是二次拟合曲线 ...
急求助用matlab怎么拟合一个过原点的二次函数答:clear x=[204.11,219.64,243.34,262.38,281.01,301.81,312.05,320.74,331.71,341.49,349.16,362.35,379.08,401.24,420.91,430.99];y=[64.33,69.17,71.18,75.72,78.55,81.52,82.57,82.20,81.23,77.37,73.13,69.74,60.59,46.27,23.04,2.98];z=y./x;[p,...