特征编码

from sklearn.preprocessing import LabelEncoder, OneHotEncoder

# 标签编码
le = LabelEncoder()
y_encoded = le.fit_transform(y)

# 独热编码
ohe = OneHotEncoder()
X_encoded = ohe.fit_transform(X_categorical)

特征缩放

from sklearn.preprocessing import MinMaxScaler, StandardScaler

# 标准化
scaler = StandardScaler()
X_scaled = scaler.fit_transform(X)

# 归一化
minmax = MinMaxScaler()
X_normalized = minmax.fit_transform(X)

转载请注明：周志洋的博客 » Python机器学习-特征工程