[R] Reading and writing to S-like databases

David Brahm a215020 at agate.fmr.com
Fri Sep 28 01:03:09 CEST 2001


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

   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

   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)
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list