Top "S4" questions

The S4 object class system is one of the methods of object oriented programming in the R language.

How to create a dataframe of user defined S4 classes in R

I want to create a data.frame of different variables, including S4 classes. For a built-in class like "POSIXlt" (for …

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r s4
Is it bad practice to access S4 objects slots directly using @?

This one is almost a philosophical question: is it bad to access and/or set slots of S4 objects directly …

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r s4
How to define the subset operators for a S4 class?

I am having trouble figuring out the proper way to define the [, $, and [[ subset operators for an S4 class. Can …

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oop r subset s4
Inheritance in R

With regards to R, Can someone explain to me, with regards to object inheritance, if I have S4 object X, …

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r inheritance s4
Sources on S4 objects, methods and programming in R

As I'm often confronted with situations where S4 programming is needed to keep an overview, I've collected quite some sources …

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r reference manual s4