在線性回歸中沒有得到正確的 output

Question

嗨，我在 (mean_squared_error=(y_test,y_pred)) 這個命令之后有疑問我沒有得到任何 output 並且在 lr_fit(x_train,y_train) 之后我只得到線性回歸

Answer 1

# doesn't return anything
# it just fit the model
# https://scikit-learn.org/stable/modules/generated/sklearn.linear_model.LinearRegression.html
lr.fit(x_train, y_train) 

# to get mean squared error, the correct syntax is
mae = mean_squared_error(y_test,y_pred)
print(mea)