R Statistics Cookbook

How it works...

Let's assume we want to process clients' data from a CSV file. The R6 classes support public and private components. Each one of them will be defined as a list containing both methods or attributes. For example, we will store the customer_id, the name, and the city as public attributes. We need to initialize them to NULL. We also need an initialize method that will be called whenever the class is instantiated. This is the equivalent of a constructor in other programming languages. Inside the initializer or constructor, we typically want to store the variables provided by the user. We need to use the self keyword to refer to the class variables. We then define a method that will return either TRUE or FALSE if the city belongs ...