Unix-like touch to update modification timestamp of file?

"Henrik Bengtsson" <hb at stat.berkeley.edu> wrote in message 
news:<59d7961d0802262154r2e049998yf5ce8ea08ab5d249 at mail.gmail.com>...

is it possible to update the modification time stamp of a file using R
(on file systems supporting it)?

For a Windows PC, if you have RTools in your path (from 
http://www.murdoch-sutherland.com/Rtools/installer.html), then you should be 
able to use the touch that's in the RTools\bin directory:

system("touch sample.dat")

efg

Earl F. Glynn
Bioinformatics
Stowers Institute for Medical Research