Re: [Rd] Package dependencies and imports

From: John Fox <>
Date: Thu 21 Sep 2006 - 16:59:12 GMT

Dear Martin and Kurt,

Adding "Enhances: rgl" to the description file did the trick!

Thank you,

John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4

> -----Original Message-----
> From: Martin Maechler []
> Sent: Thursday, September 21, 2006 10:48 AM
> To: John Fox
> Cc:
> Subject: Re: [Rd] Package dependencies and imports
> >>>>> "JohnF" == John Fox <>
> >>>>> on Thu, 21 Sep 2006 11:22:17 -0400 writes:
> JohnF> Dear list members,
> JohnF> I'm encountering the following problem with
> package dependencies and
> JohnF> imports:
> JohnF> The Rcmdr package doesn't declare a formal dependency
> JohnF> (via depends or suggests in the package DESCRIPTION)
> JohnF> on the rgl package because the latter apparently
> JohnF> causes problems on some systems. This allows the
> JohnF> Rcmdr package to build and check on systems without
> JohnF> rgl present; if rgl isn't present, then menu items
> JohnF> using it are disabled (in the development version of
> JohnF> the Rcmdr package, not installed in the first place).
> JohnF> If rgl is present, however, the Rcmdr package uses
> JohnF> some unexported functions in it. I've done this via
> JohnF> rgl::: to avoid importing from the rgl namespace:
> JohnF> Because rgl isn't declared as a dependency, I can't
> JohnF> import its namespace. In the current R 2.4.0 alpha
> JohnF> and R 2.5.0 devel, however, using rgl::: generates a
> JohnF> warning when the package is checked.
> JohnF> Is there a way around this short of literally
> copying the unexported
> JohnF> functions in rgl that Rcmdr uses?
> I think you should use the new DESCRIPTION field and say
> 'Enhances: rgl'
> but I haven't checked if this prevents the warning, though I
> think it should..
> Regards,
> Martin mailing list Received on Fri Sep 22 05:10:05 2006

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