Compatibility problem with R-2.9.0 and R-2.14.0

2 messages · harold.petithomme, Duncan Murdoch

Fri, Apr 6, 2012 4:05 AM #

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.

Kind regards,
Harold

*********************************************************
Harold PETITHOMME
Equipe Donn?es et Outils de Pr?vision (DPREVI/COMPAS/DOP)

M?t?o France - Direction de la Production
42, avenue G. Coriolis.
31057 Toulouse Cedex
France

Tel : (33/0)5.61.07.82.85
Fax : (33/0)5.61.07.86.09
E-mail : harold.petithomme at meteo.fr

Duncan Murdoch

Fri, Apr 6, 2012 7:32 AM #

On 12-04-06 7:05 AM, harold.petithomme wrote:

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