The evidence contradicts this claim:
object.size(x)
4666464 bytes
object.size(y)
5812696 bytes
so 'y' is indeed larger than 'x' (and compresses less well).
Reason: 'x' has automatic row names and 'y' does not.
On Thu, 9 Jul 2009, mike.lawre...@dal.ca wrote:
Full_Name: Mike Lawrence
Version: 2.9.0
OS: OS 10.5.7
Submission from: (NULL) (208.98.203.100)
When using save() I notice that sometimes saving smaller objects yield larger
file sizes.
x=data.frame(
expand.grid(
id=factor(1:1000)
,trial=1:24
,cue=factor(1:3)
,flank=factor(1:4)
)
)
save(x,file='temp1.Rdata') #about 20KB
y=x[x$id!='1',]
save(y,file='temp2.Rdata') #>500KB
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--
Brian D. Ripley, rip...@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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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