On Thu, Dec 17, 2009 at 5:33 AM, Gustaf Rydevik <gustaf.ryde...@gmail.com> wrote: > On Wed, Dec 16, 2009 at 10:13 PM, Peng Yu <pengyu...@gmail.com> wrote: >> >> Currently, I load the RData file then ls() and str(). But loading the file >> takes too long if the file is big. Most of the time, I only interested what >> the variables are in the the file and the attributes of the variables (like >> if it is a data.frame, matrix, what are the colnames/rownames, etc.) >> >> I'm wondering if there is any facility in R to help me avoid loading the >> whole file. > > > I thought this was interesting as well, so i did a bit of searching > through the R-help list archives and found this answer by Simon > Urbanek: > https://stat.ethz.ch/pipermail/r-devel/2007-August/046724.html > The link to a c-routine that does what you want still works, but for > future reference I'm pasting the code below.
It doesn't work for the RData file that I saved by "save(list='test', file='test.RData')". $ rdcopy test.RData Format version 3ec, R version = 23813.88.84, release = f9db1dba Sorry, this tool supported RXDR version 2 format only ______________________________________________ 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.
