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

[Pfaff, Bernhard Dr.]

Pfaff, Bernhard Dr. wrote:

> 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. 


OS? R release?

and please report the result of

   packageDescription("urca")
   packageDescription("VLMC")

Uwe Ligges


Hello Uwe,

here is the detailed information:


> R.version
               _                         
platform       i386-pc-mingw32           
arch           i386                      
os             mingw32                   
system         i386, mingw32             
status                                   
major          2                         
minor          3.0                       
year           2006                      
month          04                        
day            24                        
svn rev        37909                     
language       R                         
version.string Version 2.3.0 (2006-04-24)


Package: urca
Version: 0.9-2
Date: 2006-02-25
Title: Unit root and cointegration tests for time series data
Author: Bernhard Pfaff <bernhard.pfaff at pfaffikus.de>
Maintainer: Bernhard Pfaff <bernhard at pfaffikus.de>
Depends: R (>= 2.0.0)
Imports: nlme, methods, graphics, stats
LazyLoad: yes
Description: Unit root and cointegration tests encountered in applied
        econometric analysis are implemented.
License: GPL version 2 or newer
URL: http://www.r-project.org
Packaged: Sat Feb 25 19:34:29 2006; bp
Built: R 2.3.0; ; 2006-03-03 21:12:31; windows

-- File: C:/R/package/urca/DESCRIPTION 



> packageDescription("VLMC")
Package: VLMC
Version: 1.3-9
Note: ===== vlmc.version in R/vlmc.R
Date: 2005-10-06
Author: Martin Maechler <maechler at stat.math.ethz.ch>
Maintainer: Martin Maechler <maechler at stat.math.ethz.ch>
Title: VLMC -- Variable Length Markov Chains
Description: Functions, Classes & Methods for estimation, prediction,
        and simulation (bootstrap) of VLMC -- Variable Length Markov
        Chain -- Models
Depends: stats, MASS
License: GPL version 2 or later
Packaged: Thu Oct 6 15:00:09 2005; maechler
Built: R 2.3.0; i386-pc-mingw32; 2006-03-03 19:04:48; windows

-- File: C:/R/package/VLMC/DESCRIPTION 

Both packages have Depends/Imports directives in their DESCRIPTION
files. Now, I do get the following for VLMC if I do a 'library(MASS)'
first:

> library(MASS)
Warning message:
Verwendung der NULL Umgebung ist veraltet 
> library(VLMC)
> 

and likewise for urca:

> library(nlme)
Warning message:
Verwendung der NULL Umgebung ist veraltet 
> library(urca)
> 




> 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 
>>*****************************************************************
>>Confidentiality Note: The information contained in this
> 
> mess...{{dropped}}
> 
>>______________________________________________
>>R-devel at r-project.org mailing list
>>https://stat.ethz.ch/mailman/listinfo/r-devel
> 
>