From murdoch.duncan at gmail.com  Fri Apr  6 16:32:23 2012
From: murdoch.duncan at gmail.com (Duncan Murdoch)
Date: Fri, 06 Apr 2012 10:32:23 -0400
Subject: [Rd] Compatibility problem with R-2.9.0 and R-2.14.0
In-Reply-To: <4F7ECDFD.6060503@meteo.fr>
References: <4F7ECDFD.6060503@meteo.fr>
Message-ID: <4F7EFE77.5070602@gmail.com>

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



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