[R] data encapsulation with classes

From: Peter Williams <pdubya_at_gmail.com>
Date: Sun 08 Apr 2007 - 12:35:43 GMT

Hi All,

I'm new to R from a C and Octave/Matlab background. I am trying to construct some classes in R to which I want to attach pieces of data. First, is attr(obj, 'member name') <- data the accepted way of doing this?

Second, having attached member data with attr is there anything wrong with accessing it by the asperand (@), i.e.

> t = ""
> attr(t, 'test') <- 4
> t@test

[1] 4

I can't find any documentation on using the asperand to access attributes like this. I saw it in a piece of code as I was googling around trying to find some information on attaching data to a class in R. Is this deprecated? Is this poor form? If anyone has some suggestions please let me know.

Thank you

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