Hi R lovers,

I'm looking for more information about, and implementations of abstract classes. After reading "Head First Design Patterns" (O'Reilly). I want to know whether I could use this to build an interface, i.e. a placeholder for all possible methods in the underlying subclasses. The final goal is to end up with a more flexible/extensible design than could be achieved with inheritance and polymorphism.

I installed the 'sp' package, because I read that the Spatial Class is an abstract class, but I don't know where to look for the file where that class lives. I tried, among others, the files in: R/i486-pc-linux-gnu-library/2.9/sp/R.

Cheers!!

Albert-Jan



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In the face of ambiguity, refuse the temptation to guess.

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