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Invalid classes inferred from unique values of `y`. Expected: [0 1 2], got [1 2 3]


解决方法:对y_train进行编码再训练

from sklearn.preprocessing import LabelEncoder
le = LabelEncoder()
y_train = le.fit_transform(y_train)

model.fit(X_train, y_train)

成功:

Invalid classes inferred from unique values of `y`. Expected: [0 1 2], got [1 2 3]_机器学习


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