MATLAB 最小二乘法拟合曲线MATLAB编程用最小二乘法拟合曲线,使曲线成为y与x的一个函数关系式x:27560000,55120000,82680000,88192000,110240000,137800000y:1743170000,1894750000,2053220000,2067000000,2239250000,2411500000y=a1+
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 16:55:09
![MATLAB 最小二乘法拟合曲线MATLAB编程用最小二乘法拟合曲线,使曲线成为y与x的一个函数关系式x:27560000,55120000,82680000,88192000,110240000,137800000y:1743170000,1894750000,2053220000,2067000000,2239250000,2411500000y=a1+](/uploads/image/z/5432390-62-0.jpg?t=MATLAB+%E6%9C%80%E5%B0%8F%E4%BA%8C%E4%B9%98%E6%B3%95%E6%8B%9F%E5%90%88%E6%9B%B2%E7%BA%BFMATLAB%E7%BC%96%E7%A8%8B%E7%94%A8%E6%9C%80%E5%B0%8F%E4%BA%8C%E4%B9%98%E6%B3%95%E6%8B%9F%E5%90%88%E6%9B%B2%E7%BA%BF%2C%E4%BD%BF%E6%9B%B2%E7%BA%BF%E6%88%90%E4%B8%BAy%E4%B8%8Ex%E7%9A%84%E4%B8%80%E4%B8%AA%E5%87%BD%E6%95%B0%E5%85%B3%E7%B3%BB%E5%BC%8Fx%3A27560000%2C55120000%2C82680000%2C88192000%2C110240000%2C137800000y%3A1743170000%2C1894750000%2C2053220000%2C2067000000%2C2239250000%2C2411500000y%3Da1%2B)
MATLAB 最小二乘法拟合曲线MATLAB编程用最小二乘法拟合曲线,使曲线成为y与x的一个函数关系式x:27560000,55120000,82680000,88192000,110240000,137800000y:1743170000,1894750000,2053220000,2067000000,2239250000,2411500000y=a1+
MATLAB 最小二乘法拟合曲线
MATLAB编程
用最小二乘法拟合曲线,使曲线成为y与x的一个函数关系式
x:27560000,55120000,82680000,88192000,110240000,137800000
y:1743170000,1894750000,2053220000,2067000000,
2239250000,2411500000
y=a1+a2x+a3x²+a4+x³
MATLAB 最小二乘法拟合曲线MATLAB编程用最小二乘法拟合曲线,使曲线成为y与x的一个函数关系式x:27560000,55120000,82680000,88192000,110240000,137800000y:1743170000,1894750000,2053220000,2067000000,2239250000,2411500000y=a1+
x=[27560000,55120000,82680000,88192000,110240000,137800000]
y=[1743170000,1894750000,2053220000,2067000000,2239250000,2411500000]
f=poly2str(polyfit(x,y,3),'x')
结果
f =
-4.3137e-017 x^3 + 2.0416e-008 x^2 + 3.7073 x + 1628401409.4955
或者
f=poly2sym(polyfit(x,y,3),'x')