[R] load ing and saving R objects

[Wiener, Matthew]

This may not be quite the answer you're looking for, but I sometimes save
each such object in its own file (usually <object.name>.RData).  Then, if
you know which objects you're looking for, you know their names, and can
load the individual files.

Hope this helps,

Matt Wiener

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Richard Mott
Sent: Tuesday, June 14, 2005 9:03 AM
To: r-help at stat.math.ethz.ch
Subject: [R] load ing and saving R objects


Does anyone know a way to do the following:

Save a large number of R objects to a file (like load() does) but then 
read back only a small named subset of them . As far as I can see, 
load() reads back everything.

The context is:

I have an application which will generate a large number of large 
matrices (approx 15000 matrices each of dimension 2000*30). I can 
generate these matrices using an R-package I wrote, but it requires a 
large amouint of memory and is slow so I want to do this only once.  
However, I then want to do some subsequent processing, comprising a very 
large number of runs in which small  (~ 10) random selection of matrices 
from the previously computed set are used for linear modeling.  So I 
need a way to load back named objects previously saved in a call to 
save(). I can;t see anyway of doing this. Any ideas?

Thanks

Richard Mott
 

-- 
----------------------------------------------------
Richard Mott       | Wellcome Trust Centre 
tel 01865 287588   | for Human Genetics
fax 01865 287697   | Roosevelt Drive, Oxford OX3 7BN

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