[Rd] Compatibility problem with R-2.9.0 and R-2.14.0

Duncan Murdoch murdoch.duncan at gmail.com
Fri Apr 6 16:32:23 CEST 2012

On 12-04-06 7:05 AM, harold.petithomme wrote:
> Hello all,
> Using classical glm function with binomial family, I experienced a problem when using predict() over
> a glm object.
> I found that family objects built on R-2.14.0 contain elements like :
> .Call(C_logit_link,...)
> But on R-2.9.0, the object C_logit_link can not be found. Instead, this prior version used to call
> more simply :
> .Call("logit_link",...)
> which causes no problem.
> Is it possible to use R-2.14.0 family objects on prior R versions ?
> I may have missed some note in R changes but tried some research at least.
> Many thanks for help.

As a general rule we try to make sure objects produced in older versions 
of R are usable in newer versions, but not vice versa.  So I would 
expect that there are a lot of examples of 2.14.0 objects which can't be 
used in R 2.9.0.

Duncan Murdoch

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