最小二乘(Least Square)与多项式拟合(fitted polynomial)的理解
多项式: f ( x i ) θ 0 θ 1 x i θ 2 x i 2 ⋯ θ n x i n f(x_i)\theta_0\theta_1x_i\theta_2{x_i}^2\cdots{\theta_n}{x_i}^n f(xi)θ0θ…
用随机森林线性回归,加上网格搜索交叉验证以后就出现了以下报错 sklearn.exceptions.NotFittedError: This RandomForestRegressor instance is not fitted yet. Call fit with appropriate arguments before using this estimator. 大意是模型没和数据fit
但是我观…
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使用模型报错
#预测数据
p1model_best.predict(new_train)报错信息
D:\Program Files (x86)\anaconda\envs\ag\lib\site-packages\sklearn\base.py:318: UserWarning: Trying to unpickle estimator ExtraTreeRegressor from version 1.0.2 when using version 1.2.2. This m…