python - 如何找到多项式函数的错误？

Question

有没有可能找到像线性函数的 R 平方这样的误差？

我的代码：

df=df._get_numeric_data()

y_data = df['price']
x_data=df.drop('price',axis=1)

pr=PolynomialFeatures(degree=2)

x_train_pr=pr.fit_transform(x_train[['horsepower', 'curb-weight', 'engine-size', 'highway- 
mpg','normalized-losses','symboling']])

x_test_pr=pr.fit_transform(x_test[['horsepower', 'curb-weight', 'engine-size', 'highway- 
mpg','normalized-losses','symboling']])

RigeModel=Ridge(alpha=1)

RigeModel.fit(x_train_pr, y_train)

yhat = RigeModel.predict(x_test_pr)

标签： pythondataframescikit-learn