mathematica中用linearmodelfit拟合数据时如何显示拟合出的参数值
时间: 2023-07-31 08:13:21 浏览: 485
使用 `LinearModelFit` 函数拟合数据后,可以使用 `Normal` 属性来获得拟合出的线性模型函数。然后,使用 `Coefficient` 属性获取每个参数的值。
以下是一个例子:
```mathematica
data = {{0, 1}, {1, 3}, {2, 5}, {3, 7}};
model = LinearModelFit[data, x, x];
modelFunction = Normal[model];
params = Table[Coefficient[modelFunction, x^i], {i, 0, Exponent[modelFunction, x]}];
params
```
输出为 `{1., 2.}`,这表示拟合出的直线方程为 $y=1+2x$。
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