Data splitting is when data is divided into two or more subsets. Typically, with a two-part split, one part is used to evaluate or test the data and the other to train the model. Data splitting is an important aspect of data science, particularly for creating models based on data.
TYPES OF SPLIT DATA:
The data should ideally be divided into 3 sets – namely, train, test, and holdout cross-validation or development (dev) set. Let’s first understand in brief what these sets mean and what type of data they should have. Train Set: The train set would contain the data which will be fed into the model.
WHAT IS TRAIN TEST SPLIT:
The train-test split is used to estimate the performance of machine learning algorithms that are applicable for prediction-based Algorithms/Applications. This method is a fast and easy procedure to perform such that we can compare our own machine learning model results to machine results.
Importance of train test validation split:
The motivation is quite simple: you should separate your data into train, validation, and test splits to prevent your model from overfitting and to accurately evaluate your model.
How to divide data into train test split:
The simplest way to split the modeling dataset into training and testing sets is to assign 2/3 data points to the former and the remaining one-third to the latter. Therefore, we train the model using the training set and then apply the model to the test set. In this way, we can evaluate the performance of our model.