Using the lazy data mechanism

John,

There are lots of examples without a namespace on CRAN.  The first in the 
alphabet (in the C locale) is DAAG.  Another example (but handled 
specially) is package 'datasets'.

Taking the version on CRAN (car_1.0-18) and adding

LazyData: yes
LazyLoad: yes

worked for me (and you don't actually need the second, as it works whether 
or not the R code is lazy-loaded).

Perhaps you can let me know offline what the problems are?

Brian

Dear list members,

I'm trying to use the lazy data mechanism with the car package, so far
without success. The data sets are in the source package's data subdirectory
in the form of compressed .rda files, and I added the directive LazyData:
yes to the package's DESCRIPTION file.

I suspect that the problem is that the package has no namespace, but I've
been unable to find a reference in the Writing R Extensions manual (nor
elsewhere) that suggests that this is necessary. Is there a place that I've
missed that describes the lazy data mechanism?

There's are article in R-news, but that describes the mechanism per se. 
How to use it is in `Writing R Extensions'.

[...]

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595