OneHotEncoder is a class in the sklearn.preprocessing module of Python's scikit-learn library. It is used for transforming categorical features into a binary one-hot encoded representation. Categorical features are the variables that contain categories or groups. The OneHotEncoder class takes these categorical features and converts them into binary vectors, where each vector corresponds to a specific category. This encoding technique is commonly used in machine learning tasks where categorical variables need to be converted into a numerical format for better prediction performance. The OneHotEncoder class provides methods to fit the encoder to the data and transform the categorical features into one-hot encoded vectors.
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