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Impute missing values
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| imputer = Imputer(missing_values='NaN', strategy='mean', axis=0) | |
| # imputer = Imputer(missing_values='NaN', strategy='median', axis=0) | |
| # imputer = Imputer(missing_values='NaN', strategy='most_frequent', axis=0) | |
| # imputer = Imputer(missing_values=0, strategy='mean', axis=0) | |
| X_train = imputer.fit_transform(X_train) | |
| X_test = imputer.transform(X_test) |
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