Re: [Rd] gsub("\\", "\\\\", "C:\Program Files\R")

From: Duncan Murdoch <murdoch.duncan_at_gmail.com>
Date: Fri, 12 Aug 2011 08:20:11 -0400

On 11-08-12 4:52 AM, mafia88 wrote:
> Hi,
>
> I think it is not possible in R but I rather ask before giving up:
>
> What I have: I have copied "C:\Program Files\R" into my clipboard.
> What I want: setwd(transform("C:\Program Files\R")) where the function
> transform should change the "C:\Program Files\R" from my clipboard to
> "C:\\Program Files\\R" so that R can handle it. Is this possible?

No, but you shouldn't be doing that. You should read the string from the clipboard as a string, not as R code, because it's a string, not R code.

For example, if your clipboard contains that string,

dir <- readClipboard()
setwd(dir)

> I've tried with gsub("\\", "\\\\", "C:\Program Files\R") but failed, then
> tried first to split the full clipboard string cause \P is reserved in R but
> with strsplit("C:\Program Files\R", "") I also failed.
>
> Therefore the question: It is really necessary to manually add a second "\"
> in "C:\Program Files\R", so that setwd("C:\\Program Files\\R") can change my
> work directory?

No. You only want a single backslash in the string. The problem is that you are using the parser: to get the parser to create a string with a single backslash in it, you need to give two to the parser.

So don't use the parser.

Duncan Murdoch

> Cause I am getting tired making this manually... yes I know I can use the
> Search&Replace function from the Editor but I thought R can do everything?
>
> I hope someone could help me :(
>
> --
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>
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