[R] Reading and writing to S-like databases

[David Brahm]

Hi,

   I asked this question 2 years ago, and would like to know if the answer has
changed.

   In S-Plus, I build databases of many large objects.  In any given analysis,
I only need a few of those objects, but attach'ing the whole database is fine
since objects are only read as needed.  How can I do the same thing in R,
without reading the entire database?

   One possibility is to treat the database as a package, devoid of code but
containing many .RData files under /data, then load() each object I'll need.
Perhaps autoload() can be used to avoid having to anticipate which objects I'll
need?

   Another is to use dput and dget.  Again I need to know ahead of time which
objects I'll want.

   On July 20, 1999, Ross Ihaka [mailto:ihaka at stat.auckland.ac.nz] wrote:
> We are building the infrastructure for adding external databases which can be
> attached in the S fashion. One of the class of external data base will be
> that of S .Data directories.

I'm not sure where that ended up -- could you clarify, Ross?  Thanks!

			-- David Brahm (a215020 at agate.fmr.com)
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