Podział na zbiór treningowy i testowy

Przykład w Python

from sklearn.cross_validation import train_test_split
X_train, X_test, Y_train, Y_test = train_test_split(X, Y, test_size = 0.2, random_state = 0)

Przykład w R

library(caTools)
set.seed(123)
split = sample.split(dataset$Purchased, 0.8)
training_set = subset(dataset, split == TRUE)
test_set = subset(dataset, split == FALSE)