[R] importing large objects

ripley@stats.ox.ac.uk ripley at stats.ox.ac.uk
Sat Jun 15 22:13:37 CEST 2002

On Sat, 15 Jun 2002, Sirotkin, Alexander wrote:

> I was trying to import a very large data table to R using RODBC. By
> large meaning a table of 600 real
> numbers and 10000 rows. It failed saying that it reached a memory limit.

Which is what?  Buy some more memory: I am sure TI can afford it!

> This is extremely weird
> because S-Plus can import the same table, and it does this quite fast.

Why is it `extremely wierd'?  Why do you expect user-contributed software
(which is not even in the main CRAN section) for a free package to be as
memory-efficient as a commercial package?

> Are there any limitations on objects size in current implementation of R ?

Yes, around 2Gb for each object (increased in the current R-devel).

We would welcome contributions of improvements to RODBC or funds to
develop it (and I note that you are posting from a large commercial

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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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