# Pre-Processing¶

 OneHotEncoder([allow_drop]) Encode categorical columns with M categories into M-1 columns according to the one-hot scheme.
 Encode categorical columns to numeric by converting each category to an integer value. encode_categorical(table[, columns]) Encode categorical columns with M categories into M-1 columns according to the one-hot scheme. standardize(table[, with_std]) Perform Z-Normalization on each numeric column of the given table.