In recent efforts to develop a package, I'm including datasets in the data/
folder of my package. In my specific case I have 5 datasets all of which are in data.table
format (although the issues I describe below persist if I keep them as data.frame
). I've saved each one as individual .rda
files and documented them appropriately.
When I run check()
from package devtools
, I get the following warnings:
checking data for ASCII and uncompressed saves ... WARNING
Warning: large data file(s) saved inefficiently:
size ASCII compress
data1.rda 129Kb TRUE gzip
data2.rda 101Kb TRUE gzip
data3.rda 1.6Mb TRUE gzip
Note: significantly better compression could be obtained
by using R CMD build --resave-data
old_size new_size compress
data1.rda 129Kb 34Kb xz
data2.rda 101Kb 20Kb xz
data4.rda 92Kb 35Kb xz
data3.rda 1.6Mb 116Kb xz
species.rda 12Kb 9Kb xz
I've tried saving the data with resaveRdaFiles
(package tools
) with the recommended xz
compression. Even after doing that, the warning persists.
OK, so I run R CMD build --resave-data
and the warning continues to persist.
What am I missing here and how do I overcome this issue (now and in the future)?
When you save your .rda
file, please use the command: save(..., file='test.rda', compress='xz')
This will help to solve the problem!
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