[Moved to r-devel for further discussion, bcc:ed r-help for the record] Hi Benilton, it is possible that this has to do with so called unevaluated promises. I had a similar problem a few months ago. I emailed R-devel about it - "[Rd] save() saves extra stuff if object is not evaluated" (Thu May 25 09:19:28 CEST 2006) [ https://stat.ethz.ch/pipermail/r-devel/2006-May/037859.html ], and Luke Tierney gave a very good explanation on what was going on. Since then save() has gained an extra argument 'eval.promises=TRUE', cf. R v2.4.0 NEWS [ http://cran.at.r-project.org/ ]: o save() by default evaluates promise objects. The old behaviour (to save the promise and its evaluation environment) can be obtained by setting the new argument 'eval.promises' to FALSE. (Note that this does not apply to promises embedded in objects, only to top-level objects.) You are already running R v2.4.0 so this should apply to your session already. However, note the last sentense in parentheses; it does not handle promises in embedded objects. You could try to evaluate your environments/promises manually using, say, is.null(env) (as I did in my example in my May message) and see if it makes a difference. Hope this helps Henrik
On 11/14/06, Benilton Carvalho <bcarvalh at jhsph.edu> wrote:
Hi everyone,
I have 2 environments (2 different R sessions) as described below:
Session 1:
Name of the environment: "CrlmmInfo"
Objects in the environment:
index1: logical index - length 238304
index2: logical index - length 238304
priors: list of 4 - (matrix 6x6, 2 vectors of length 6, vector of
length 2) - all num
params: list of 4:
centers [238304 x 3 x 2]: num
scales [238304 x 3 x 2]: num
N [238304 x 3]: num
f0 [scalar]: num
If I save this environment to a file, I get a file of 23MB. Great.
Session 2:
Analogous to "Session 1", but replace 238304 by 262264.
If I save the environment on Session 2, I get a file of 8.4GB.
I applied object.size on each of the objects in each environment, and
this is what I got:
For Session 1:
index1: 16204864
index2: 16204864
priors: 3336
params: 74353584
For Session 2:
index1: 1049096
index2: 1049096
priors: 3336
params: 81829104
Is this increase from 23MB to 8.4GB expected to happen?
Benilton
sessionInfo() on both sessions is identical:
> sessionInfo()
R version 2.4.0 (2006-10-03) x86_64-unknown-linux-gnu locale: LC_CTYPE=en_US.iso885915;LC_NUMERIC=C;LC_TIME=en_US.iso885915;LC_COLLATE =en_US.iso885915;LC_MONETARY=en_US.iso885915;LC_MESSAGES=en_US.iso885915 ;LC_PAPER=en_US.iso885915;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASU REMENT=en_US.iso885915;LC_IDENTIFICATION=C attached base packages: [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" [7] "base"
> version
_ platform x86_64-unknown-linux-gnu arch x86_64 os linux-gnu system x86_64, linux-gnu status major 2 minor 4.0 year 2006 month 10 day 03 svn rev 39566 language R version.string R version 2.4.0 (2006-10-03)
______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.