On Tue, 25 Jun 2013, Duncan Murdoch wrote:
On 13-06-25 7:14 AM, Søren Højsgaard wrote:
Dear Duncan,
Excellent, thanks!
Maybe this is worth a remark in a future version of "Writing R Extensions"
(including that those "local copies" are not exported again with
exportPattern("^[[:alpha:]]+")).
It is mentioned that they can be exported. The fact that exportPattern
doesn't see them might be a bug.
I don't think it's a bug -- including all imports would usually bring
in way too much.
In general re-exporting is probably not such a great idea since the
help system isn't aware of the import/export chain. I don't know if R
CMD check complains if you don't provide your own help page; if it
doesn't it probably should. I also don't recall if we have a
mechanism for such a help page on an import/export to just link to the
real page.
Best,
luke
Duncan
Thanks!
Søren
-----Original Message-----
From: Duncan Murdoch [mailto:murdoch.dun...@gmail.com]
Sent: 25. juni 2013 13:02
To: Søren Højsgaard
Cc: R hELP (r-h...@stat.math.ethz.ch)
Subject: Re: [R] Issue with Imports in NAMESPACE
On 13-06-25 6:50 AM, Søren Højsgaard wrote:
Dear all,
In my gRbase package I have up until now "Depend"-ed on RBGL (from
Bioconductor), but good people have convinced me that I should use
"Import"-it instead because I only use few functions from RBGL.
In DESCRIPTION I therefore now have
Imports: Matrix,RBGL
In NAMESPACE I now have
importFrom(RBGL, maxClique, is.triangulated, separates)
The package compiles without complaints, but I have noticed that if I
start a fresh R-session, then maxClique etc. from RBGL is NOT available
for "interactive use" in my session:
library(gRbase)
maxClique
Error: object 'maxClique' not found
1) Is this as it should be?
2) If yes, is there any other way in which maxClique can be imported for
interactive use without Depend-ing the whole RBGL package?
The importFrom directive effectively makes local copies of those functions
in your package (with the usual caveats that copies aren't as inefficient
as you might think). If you want to export them, you need to add them to
the exports list.
Duncan Murdoch
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