[Rd] data/ and data()
Paul Gilbert
pgilbert at bank-banque-canada.ca
Fri Oct 24 15:52:45 MEST 2003
(Changed thread from [Rd] Accessing data files w/ --use-zip-data.)
Prof Brian Ripley wrote:
> I have been proposing, and may implement as soon as 1.9.0, to process all
>
>the data directory at install time to .rda files in a database (details
>depend on Luke's final choice of implementation) which is load-on-demand
>and perhaps unload if not currently used. So it not a good idea to use
>the data directory for files other than those to be accessed by data().
>
An issue related to data files that needs to be reconsidered (IMO) is
the fact that data files cannot use functionality defined in the
package, according to Writing R Extensions.
This is not too serious a problem with S3 classes, but to the limited
extent that I understand S4 classes, I think this means that a package
cannot have example data in a class stucture that is defined in the
package. This will certainly hinder my ability to switch to S4 classes
(assuming that I ever get the time to try it).
Paul Gilbert
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