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representation
2004 Sep 30
1
Problem with _new_ if class "lm" in object representatio n.
...do it only in some rare very special cases.
The NULL exception in slot assignement will allow me object
initialization using just "new" without providing a "if" polluted
function initialize.
> setClass("bar")
[1] "bar"
> setClass("foo", representation(x="numeric", y="bar"))
[1] "foo"
> new("foo", x=1)
Error in validObject(.Object) : Invalid "foo" object: Invalid object for
slot "y" in class "foo": got class "NULL", should be or extend class "bar"
>...