system2("sed", args=c("-i", "s/oldword\\s/newword/g", "d:/junk/x/test.tex"))
/Henrik On Fri, Oct 11, 2013 at 8:58 AM, David Winsemius <dwinsem...@comcast.net> wrote: > > On Oct 10, 2013, at 8:16 AM, Zev Ross wrote: > >> Hi All, >> >> I'm trying to edit a file in place using system2 and sed from within R. I >> can get my command to work unless there is a backslash in the command in >> which case I'm warned about an "unrecognized escape". So, for example: >> >> system2("sed -i s/oldword/newword/g d:/junk/x/test.tex") # works fine >> system2("sed -i s/oldword\s/newword/g d:/junk/x/test.tex") # does not work >> in R (the command works on the command line) >> >> I've experimented with double slashes to escape the \s, > > Wouldn't you want to double the backslashes instead? > >> I've tried the "shell" command, I've tried experimenting with shQuote and >> can't seem to get around the "unrecognized escape" issue. >> >> By the way, it would be preferable to have a solution that avoided using >> double backslashes etc because, unfortunately, in my real-world example, I'm >> actually replacing double slashes and would prefer not to have quadruple >> slashes etc. >> >> I'm using Windows 7, 64 bit. >> >> Zev >> >> -- >> Zev Ross >> ZevRoss Spatial Analysis >> 120 N Aurora, Suite 3A >> Ithaca, NY 14850 >> 607-277-0004 (phone) >> z...@zevross.com >> >> ______________________________________________ >> 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. > > David Winsemius > Alameda, CA, USA > > ______________________________________________ > 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. ______________________________________________ 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.