The train-test split procedure is used to estimate the performance of machine learning algorithms when they are used to make predictions on data not used to train the model.

It is a fast and easy procedure to perform, the results of which allow you to compare the performance of machine learning algorithms for your predictive modeling problem.

Methods description

• sklearn: This module provides simple and efficient tools for data mining and data analysis. It includes various algorithms and utilities for machine learning tasks;
• model_selection: This submodule within sklearn provides tools for model selection and evaluation, including methods for splitting data into training and testing sets;
• .train_test_split(): This function splits arrays or matrices into random train and test subsets. It takes in arrays X and y representing features and target variables, respectively. The test_size parameter determines the proportion of the dataset to include in the test split. The random_state parameter sets the seed used for random sampling to ensure reproducibility. It returns four arrays: X_train, X_test, y_train, and y_test, representing the training and testing sets for features and target variables, respectively.