See also Omegahat package Rcompression (a copy of which for Windows is
on CRANextras).
But I would do this via unzip, modify, zip
On Tue, 3 Aug 2010, Jeff Newmiller wrote:
In the way you describe it, no.
A) There is no such thing as a "zip folder". You are most likely
being fooled by the visual presentation of zip files in Windows
Explorer, which automatically simulates it as a folder, when it is
really extracting bits of data as needed to display it.
B) Because the data must be decompressed to be manipulated, there is
no performance or disk space advantage to creating a facility such
as you describe, though thee may be a convenience factor if you do
it a lot.
C) There is a function zip.file.extract() in R for extraction, but I
don't see a zip compression function, so you will need to use
external programs, perhaps executed using the "system" function, to
generate updated zip files.
You both missed utils::unzip.
D) It is almost always a bad idea to overwrite your original data,
since this prevents you from retracing your data processing steps
later for verification or debugging purposes.
j.delashe...@ed.ac.uk wrote:
Dear list,
is there a way to open a .zip folder so that one can extract and
modify files inside and then save teh .zip folder again?
thanks!
Jose
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