[Rd] R 2.3.0: Use of NULL as an environment is deprecated

[Pfaff, Bernhard Dr.]

Pfaff, Bernhard Dr. wrote:

> Dear R-Devel subscriber,
> 
> first, let me express my thank to the R-Core team for the new release!
I
> appreciate their efforts and time spent to enhance R.
> In accordance with the 'NEWS' file (see excerpt of it below), 
> 
> [...
> o	Changed the environment tree to be rooted in an empty
> 	environment, available as emptyenv().  baseenv() has been
> 	modified to return an environment with emptyenv() as parent,
> 	rather than NULL.
> 
> ...
> 
> o	Use of NULL as an environment is deprecated and gives a warning.
> ...]
> 
> I detected the warning message as announced for a couple of
contributed
> packages, e.g.
> 
> library(ape)
> library(car)
> library(chron)
> library(urca)


Not so for me. Are you sure you have reinstalled those packages under 
R-2.3.0?

Uwe Ligges


Dear Uwe,

thank you for your hint. That fixes the warnings for packages 'ape',
'car' and 'chron' issued formerly. However, even after a fresh install
the warnings still show up for the packages 'VLMC' and 'urca', as an
example.
Any further clues are most welcome. 

Best,
Bernhard

> Now, I am wondering what would be a suitable/elegant way to fix the
> packages' code such that the warning does not appear any longer. I am
> adressing this question to R-devel, because this might also be of
> interest for other package mainatiners.
> 
> Many thanks in advance for any hints and pointers.
> 
> Regards,
> Bernhard
> 
> 
> 
> 
> Dr. Bernhard Pfaff
> Global Structured Products Group
> (Europe)
> 
> Invesco Asset Management Deutschland GmbH
> Bleichstrasse 60-62
> D-60313 Frankfurt am Main
> 
> Tel: +49(0)69 298 07230
> Fax: +49(0)69 298 07178
> Email: bernhard_pfaff at fra.invesco.com 
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