Sklearn Preprocessing

Label Encoder, One Hot Encoder

Code credit:
Label Encoder
One Hot Encoder
https://www.udemy.com/machinelearning/ 

from sklearn.preprocessing import LabelEncoder, OneHotEncoder
labelencoder = LabelEncoder()
X[:, 3] = labelencoder.fit_transform(X[:, 3])
onehotencoder = OneHotEncoder(categorical_features = [3])
X = onehotencoder.fit_transform(X).toarray()


List of Scalars
Some formulas

Standard Scalar

Code credit:
Scikit-learn
https://www.udemy.com/machinelearning/ 

from sklearn.preprocessing import StandardScaler
sc_X = StandardScaler()
X_train = sc_X.fit_transform(X_train)
X_test = sc_X.transform(X_test)
sc_y = StandardScaler()
y_train = sc_y.fit_transform(y_train)