On 8/24/07, Duncan Murdoch <[EMAIL PROTECTED]> wrote: > On 8/24/2007 1:05 PM, Gabor Grothendieck wrote: > > On 8/24/07, Dirk Eddelbuettel <[EMAIL PROTECTED]> wrote: > >> On Fri, Aug 24, 2007 at 10:57:46AM -0400, Duncan Murdoch wrote: > >> > On 8/24/2007 10:33 AM, Dirk Eddelbuettel wrote: > >> >> On Fri, Aug 24, 2007 at 08:32:00AM -0400, Duncan Murdoch wrote: > >> >>> On 8/24/2007 6:58 AM, Ronaldo Reis Junior wrote: > >> >>> > Hi, > >> >>> > > It is possible to use a shell command inside a R script? > >> >>> > > I'm write a R script and I like to put somes shell commands inside > >> >>> > > to > >> >>> R. > Somethink like: convert fig01.png fig01.xpm or sed ..., etc. > >> >>> The details and available functions depend on the platform, but you > >> >>> want > >> >>> to look at ?system, ?shell, and/or ?shell.exec. (These all exist in > >> >>> Windows; on Unix-alikes, you probably won't have the latter two.) > >> >> Don't forget pipes. R's ability to consistently work on connections that > >> >> may be local > >> >> files, remotes files, program output, ... is a true treasure (and > >> >> thanks and credits to, I believe, Brian Ripley to make it so). > >> >> Eg you can do this OD <- read.table(pipe("links -dump > >> >> http://cran.r-project.org/src/contrib/ | awk '/tar.gz/ {print $3, > >> >> $4}'"), > >> >> header=FALSE, col.names=c("file", "date")) > >> >> to get files and dates of files on CRAN. As I recall, this also works > >> >> on > >> >> that other operating system, provided > >> >> you do all the legwork of installing other tools, setting PATHs etc > >> >> to provide what works out of the box on the supposedly unfriendlier OS. > >> > > >> > The pipe command you list doesn't work in Windows. I'd guess this is > >> > because the pipe syntax "|" within the command is unsupported: it tries > >> > to > >> > execute "links", with the rest of the line passed as arguments. But I > >> > haven't traced through to check on this. > >> > >> Hm, wishful thinking must have gotten the better of me then. Sorry for > >> spreading misinformation about the capabilities of that other OS. > > > > This works for me on Windows: > > > >> tab <- read.table(pipe("lynx --nolist --dump > >> http://cran.r-project.org/src/contrib/ | findstr tar.gz"), as.is = TRUE) > > Which R version is that? It doesn't work for me in Rgui, though it does > in Rterm, both R-devel versions. >
I am using Rgui > R.version.string [1] "R version 2.5.1 (2007-06-27)" on Windows XP. "lynx --version" gives: Lynx Version 2.8.5rel.1 (04 Feb 2004) libwww-FM 2.14FM, SSL-MM 1.4.1, OpenSSL 0.9.7d-dev Compiled by Borland C++ (Feb 5 2004 17:35:58). Copyrights held by the University of Kansas, CERN, and other contributors. Distributed under the GNU General Public License. See http://lynx.isc.org/ and the online help for more information. See http://www.moxienet.com/lynx/ for information about SSL for Lynx. See http://www.openssl.org/ for information about OpenSSL. ______________________________________________ R-help@stat.math.ethz.ch 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.