[BioC] contrast matrix warning

[Seth Falcon]

Hi Matt,

On  9 Jan 2006, scholz at ag.arizona.edu wrote:

> Hi all,
>
> I am getting a warning message when I create my contrast matrix (for
> a six-membered loop design experiment) that I can't find any
> previous threads about. The message reads:
>
> Warning message:
> use of NULL environment is deprecated

What version of R are you using?  My guess is a recent R-devel.  The
NEWS file says:

 o   Changed environment tree to be rooted in an empty environment,
     available as emptyenv().  baseenv() 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. 

You will, at least, see this message any time you load an annotation
data package (that is, until we rebuilt the annotation packages with
the latest R-devel).

+ seth