Dear R-ers,
I don't understand the following, maybe someone will help me
explain:
> setClasss('A')
[1] "A"
> new('a')
Error in new("a") :
trying to generate an object from a virtual class ("a")
> setClass('b', contains='a')
[1] "b"
> new('b')
An object of class “b”
<S4 Type Object>
In what way is B more concrete than A so that it's possible do
instantiate B but not A? I don't quite get it. B adds nothing to
nothing, and yet it's instantiable, while it's base is not. Makes
no sense to me.
-- Hun
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