s1 should use \\ like this: s1<- "C:\\Rtools\\bin;C:\\Rtools\\perl\\bin;C:\\Rtools\\MinGW\\bin;C:\\Program\\MiKTeX 2.7\\miktex\bin"
Also 1. you won't need to change your path in the first place if you use the batchfiles at http://batchfiles.googlecode.com 2. there is also a free path editor discussed there. See Q4 or Q8 in the troubleshooting faq on that same page. On Mon, Aug 17, 2009 at 3:21 AM, ravi<[email protected]> wrote: > Hi R-users and R-experts, > I am having a hard time in figuring out how to tackle regex questions where > the "backslash" character is an integral part of the string. Let me explain > how I came across this problem : > I wanted to clearly see all the components in the windows environmental path > variable. This is a long string. For easy readability, I wanted to split up > this string so that each component starts on a new line. But I ran smack into > a problem in the very first step - in reading in the string. Look at the > following code : > > ##### path variable has been shortened to show only the first few components > s1<- "C:\Rtools\bin;C:\Rtools\perl\bin;C:\Rtools\MinGW\bin;C:\Program\MiKTeX > 2.7\miktex\bin;" > s2<-gsub(";",";\n",s1) > cat(s2,"\n") > > I get the following warning messages after the first line : > Warning messages: > 1: '\R' is an unrecognized escape in a character string > 2: '\R' is an unrecognized escape in a character string > 3: '\p' is an unrecognized escape in a character string > 4: '\R' is an unrecognized escape in a character string > 5: '\M' is an unrecognized escape in a character string > 6: '\P' is an unrecognized escape in a character string > 7: '\M' is an unrecognized escape in a character string > 8: '\m' is an unrecognized escape in a character string > 9: unrecognized escapes removed from > "C:\Rtools\bin;C:\Rtools\perl\bin;C:\Rtools\MinGW\bin;C:\Program\MiKTeX > 2.7\miktex\bin;" > > I thought about attempting to escape the escape character and so on. Is that > a workable option here? However, for this to work, I must first be able to > read in the string correctly. The simplest solution, if it is at all > possible, would be to temporarily change the escape character. To "%", for > example. Is such a declaration possible? Other alternatives? > I would appreciate help in understanding different ways of solving this > problem. > Thanking you, > Ravi > > > ______________________________________________ > [email protected] 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. > ______________________________________________ [email protected] 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.
