From: ripley@stats.ox.ac.uk
Date: Sun 22 Dec 2002 - 19:26:26 EST
Message-id: <Pine.LNX.4.31.0212220820010.26654-100000@gannet.stats>
Why guess? It's in the R Language definition and in all good books on
S/R.
`String constants are delimited by a pair of single (') or double (")
quotes and can contain all other printable characters. Quotes and other
special characters within strings are specified using escape sequences:'
paste("c:", "work", "part1.txt", sep="\\")
On Sun, 22 Dec 2002, John Miyamoto wrote:
> Dear R-Help,
> I'm using R version 1.6.0 on a Windows computer. I am trying to create
> a function that, among other things, constructs strings that refer to
> Windows files, e.g., I might want to construct a string like
> 'c:\work\part1.txt'. I have found that the following does not work.
>
> > paste("c:", "\", "work", "\", "part1.txt", sep="")
> Error: syntax error
>
> I'm guessing that R interprets "\" as some kind of special control
> character, and that there is some way to show that one wants a literal
> interpretation of "\" and not a control interpretation, but I haven't been
> able to find an explanation of this issue. I understand that I must use
> 'c:\\work\\part1.txt' or 'c:/work/part1.txt' to refer to the file that
> Windows knows as 'c:\work\part.txt', but what I'm trying to do is to
> write an R function that writes references to Windows files into a text
> file, where a different Windows programs will later read these references
> in the standard Windows syntax.
c:/work/part1.txt *is* standard Windows syntax, too!
> Can someone tell me how to create the character string
> 'c:\work\part1.txt' from the parts, "c:", "work", an "part1.txt"?
-- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595______________________________________________ R-help@stat.math.ethz.ch mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
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