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问题描述
我有一个 Pandas 数据框并将 df[list_of_columns] 作为 X 和 df[[single_column]] 作为 Y 传递给随机森林回归器.
I have a pandas dataframe and passing df[list_of_columns] as X and df[[single_column]] as Y to a Random Forest regressor.
以下警告是什么意思，应该怎么做才能解决?
What does the following warnning mean and what should be done to resolve it?
DataConversionWarning: A column-vector y was passed when a 1d array was expected. Please change the shape of y to (n_samples, ), for example using ravel(). probas = cfr.fit(trainset_X, trainset_Y).predict(testset_X)
推荐答案
只需检查你的 Y 变量的形状，它应该是一个一维对象，你可能传递了更多的东西(可能是微不足道的)维度.将其重塑为列表/一维数组的形式.
Simply check the shape of your Y variable, it should be a one-dimensional object, and you are probably passing something with more (possibly trivial) dimensions. Reshape it to the form of list/1d array.
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