On Tue, 9 Feb 2010, spencerg wrote:
Can one write a zip file from R? I want to create a file with a name like "dat.zip", being a zip file containing "dat.csv". I can create "dat.csv", then call "system('zip -r9 dat.zip dat.csv')". Is there a better way?
Not really. One could use compiled code like that in unzip() to do this, but as nothing inside R is involved the only gain would be to not need to have the zip executable present. Omegahat package Rcompression does have means to manipulate .zip files from compiled code with an R interface, but not AFAICS a simpler way to do what you want.
I can use "gzfile" to write a gz file, but I don't know how to give that a structure that would support unzipping to a *.csv file.
A zip file is not a gzipped file, even though gzip compression is used for parts of the contents. The header and trailer are quite different.
Thanks,Spencer --Spencer Graves, PE, PhD President and Chief Operating Officer Structure Inspection and Monitoring, Inc. 751 Emerson Ct. San José, CA 95126 ph: 408-655-4567 ______________________________________________ R-help@r-project.org 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.
-- 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
______________________________________________ R-help@r-project.org 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.
