RData size
You can confirm it very easy by adding 'compress = FALSE' to the save function. You will see that the .RData files are the same size since you are not compressing them.
On Tue, Jan 4, 2011 at 7:19 PM, array chip <arrayprofile at yahoo.com> wrote:
Hi, I noticed a Rdata size issue that's puzzling to me. Attached find 2 example
datasets in text file. Both are 100x5, so the sizes for both text file are the
same. However, when I read them into R, the sizes are much different:
tt<-as.matrix(read.table("tt.txt",header=T,row.names=1))
save(tt,file='tt.RData')
tt.big<-as.matrix(read.table("tt.big.txt",header=T,row.names=1))
save(tt.big,file='tt.big.RData')
"tt.RData" is 2KB while "tt.big.RData" is 5KB. This is not a big deal with the
example datasets, but my real datasets are much larger, the difference is 35MB
vs. 1MB for the RData objects.
The difference between the 2 datasets above is that "tt.big" is a smoothed
version of "tt", so there are a lot less unique values in tt.big than tt, I
guess this is the reason for the difference in sizes of RData objects, can
anyone confirm?
Thanks
John
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