[Rd] R 2.6.0 S4 data breakage, R _data_class(), class<-, etc.

[Bjørn-Helge Mevik]

Martin Morgan wrote:

> But both 'new' and 'as' appear to produce invalid (in a different
> sense, I guess) objects:
>
>> setClass("snp", contains="raw",
> +          validity=function(object) {
> +              if (length(object) < 1) "too short"
> +              else TRUE
> +          })

Well, you _have_ designed a class with an invalid prototype (as
determined by your own validity function). :-)

-- 
Bjørn-Helge Mevik