search for: morerigor

...ain purposes of objects in programming is to hide implementation details from users. This has two benefits: you can change the implementation without breaking other people's code, and you can have the same interface for a wide variety of objects with very different internal implementations. In morerigorously object-oriented languages there is no access to the internals of an object --- you can only use the supplied accessor functions. In S, things are less dictatorial. You *can* use model$residuals to access the residuals component of a glm directly, or you can use the accessor function resid(mo...