Probably cool but "evil", I should say, but I do not have a better choice at the moment.
This script does not take the R version into account (e.g. after you update R, your new version may not be able to get into PATH via this script), so you may consider improving it a little bit. Please contact me offline if you are interested. Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 515-294-2465 Web: http://yihui.name Department of Statistics, Iowa State University 2215 Snedecor Hall, Ames, IA On Thu, Dec 8, 2011 at 4:16 PM, Janko Thyson <janko.thyson.rst...@googlemail.com> wrote: > This is a very very very late follow up, but I remember asking this question > and just stumbled across an answer by Yihui. Check his file > 'add-R-path-win.R' script which you can find at > https://github.com/yihui/lyx/blob/master/README.md > > Very cool, thanks Yihui. > > Regards, > Janko > > > On 29.06.2011 20:58, Duncan Murdoch wrote: >> >> On 29/06/2011 2:24 PM, Janko Thyson wrote: >>> >>> Dear list, >>> >>> this is not directly an R question, but it is somewhat related to R >>> aspects, so I hope it's okay to post it here: >>> >>> I'd like to update my windows PATH based on a script routine in order to >>> make sure that crucial components are contained. Much like what happens >>> at the installation of Rtools (if desired). Now, can you do that from >>> within R or do I need some sort of windows batch file or something like >>> AutoIt script (http://www.autoitscript.com/site/autoit/)? If so, what >>> would I need to put in there? >> >> >> You need to set the registry entry if you want a persistent change to the >> PATH. Sys.setenv just modifies R's copy of the PATH. Child processes will >> see the modifications, but they don't last beyond the R session. >> >> You'll have to check MS docs to find which registry entry to mess with. >> Alternatively, if you feel lucky, just use Control Panel to set some >> strange path, then see where your change showed up using regedit. >> >> R doesn't have a built-in function to write to the registry, but there are >> various utilities available outside of R to do it. >> >> Duncan Murdoch >> >>> >>> Here's what I tried in R: >>> >>> unlist(strsplit(Sys.getenv("PATH"), ";")) >>> PATH.0<- Sys.getenv("PATH") >>> PATH.1<- paste(PATH.0, "C:\\blabla\bin") >>> Sys.setenv("PATH"=PATH.1) >>> unlist(strsplit(Sys.getenv("PATH"), ";")) >>> >>> The changes seem to be reflected, but when I check my PATH the new entry >>> isn't there. I guess there is no actual "feedback" to Windows system >>> environment variable and that's exactly what I would like to accomplish >>> >>> Thanks a lot for any advice, >>> Janko >>> >>> ______________________________________________ >>> 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. ______________________________________________ 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.
