[Rd] Incorporating single functions from other packages: rules and regulations?
murdoch.duncan at gmail.com
Mon Jan 14 00:44:31 CET 2013
On 13-01-13 3:44 PM, Tim Triche, Jr. wrote:
> a n00b question:
> if I call importFrom(IRanges, ranges) in my NAMESPACE file, that works
> but if I call
> R> importFrom(IRanges, ranges)
> ## Error: could not find function "importFrom"
> well, that doesn't work great.
The NAMESPACE file is parsed as R code, but you should think of it as a
bunch of declarations, not as something executable. There's no
If you want to do something similar at run-time, you could use
ranges <- IRanges::ranges
This creates a copy of the function you want in the current environment.
The closest thing I can find in base is
> which helpfully informs me that it is one of several
> Internal namespace support functions. Not intended to be called directly.
> Where's the best place to learn about how namespaces and import/export
> facilities (particularly in R-3.0) are implemented?
Probably the source code.
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