Advanced Object-oriented Programming In R: Stat... May 2026

Reference Classes are built into base R and function similarly to R6 but are built on top of S4.

Encapsulation (private vs. public fields); reference semantics (modify objects in-place); method chaining.

Strict type checking; multiple dispatch (methods can choose logic based on multiple arguments). Cons: High "ceremony" and steep learning curve. 3. R6: The Modern Powerhouse Advanced Object-Oriented Programming in R: Stat...

S4 is a more formal version of S3, requiring explicit class definitions with "slots" and typed data.

Managing stateful objects (like database connections, caches, or GUI widgets) and avoiding R’s usual copy-on-modify behavior. Reference Classes are built into base R and

S3 is R’s original, informal OOP system. It is essentially a list with a "class" attribute.

R6 (via the R6 package ) provides "classical" OOP similar to Java or C++. Strict type checking; multiple dispatch (methods can choose

Requires an external dependency; can lead to "non-idiomatic" R code if overused. 4. Reference Classes (RC): The Internal Alternative