R and object oriented programming

by

S3 classes

  • Not really objects, more of a naming convention
  • Based around the . syntax: E.g. for print, print calls print.lm print.anova, etc. And if not found,print.default

S4 classes

Reference classes

proto

  • ggplot2 was originally written in proto, but will eventually be rewritten using S3.
  • Neat concept (prototypes, not classes), but seems tricky in practice
  • Next version of ggplot2 seems to be moving away from it
  • Description of the concept and implementation

R6 classes

  • By-reference
  • Does not depend on S4 classes
  • “Creating an R6 class is similar to the reference class, except that there’s no need to separate the fields and methods, and you can’t specify the types of the fields.”

More Related Contents:

  1. What is an example of the Liskov Substitution Principle?
  2. What is polymorphism, what is it for, and how is it used?
  3. Interface vs Base class
  4. When to use an interface instead of an abstract class and vice versa?
  5. Difference between abstraction and encapsulation?
  6. Monad in plain English? (For the OOP programmer with no FP background)
  7. Difference between object and instance
  8. What is the exact problem with multiple inheritance?
  9. Why can’t I seem to grasp interfaces?
  10. Is it possible to access struct fields from within a trait?
  11. HAS-A, IS-A terminology in object oriented language
  12. Functional programming vs Object Oriented programming [closed]
  13. Explanation of the UML arrows
  14. Where do I use delegates? [closed]
  15. Difference Between Cohesion and Coupling
  16. What is the scope of the Single Responsibility Principle? [closed]
  17. Polymorphism – Define In Just Two Sentences [closed]
  18. How much work should be done in a constructor?
  19. When to use mixins and when to use interfaces in Dart?
  20. Why “private” methods in the object oriented?
  21. What is the meaning and reasoning behind the Open/Closed Principle?
  22. What does “S3 methods” mean in R?
  23. Doctrine2 ORM does not save changes to a DateTime field
  24. Can’t seem to understand SOLID principles and design patterns [closed]
  25. What is the real difference between “Bastard Injection” and “Poor Man’s Injection”
  26. Difference between value parameter and reference parameter?
  27. Differences between Proxy and Decorator Pattern
  28. A use for multiple inheritance?
  29. What is immutability and why should I worry about it?
  30. adapter-Any real example of Adapter Pattern [closed]

Leave a Comment