[R] using paste and "\" to create a valid filename

[Berton Gunter]

... and you can see that the "\\" is correct by cat(rankFile) instead of
print(rankFile), which is what entering the variable at the prompt actually
does.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Uwe Ligges
> Sent: Friday, August 19, 2005 8:04 AM
> To: roger bos
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] using paste and "\" to create a valid filename
> 
> roger bos wrote:
> 
> > Sometimes even the easy stuff is difficult (for me)... I want to get
> > input from different places to paste together an excel filename (so
> > you know I'm using windows) that I can open with RODBC.  I 
> know about
> > using double "\" since its an escape character, but I get 
> either 2 or
> > none, I can't get just one "\" where I need it.  See example code
> > below.  I am using R 2.1.0, but plan to upgrade soon.  Thanks in
> > advance to anyone who can help.
> > 
> > Roger
> > 
> > 
> > rankPath <- "R:\New Ranks\SMC\SMC"				
> > rankDate <- "20050819"				
> > rankFile <- paste(rankPath,rankDate,".xls", sep="")
> > rankFile
> > [1] "R:New RanksSMCSMC20050819.xls"
> > 
> > 
> > rankPath <- "R:\\New Ranks\\SMC\\SMC"				
> > rankDate <- "20050819"				
> > rankFile <- paste(rankPath,rankDate,".xls", sep="")
> > rankFile
> > [1] "R:\\New Ranks\\SMC\\SMC20050819.xls"
> 
> 
> This is perfect, "\" is *printed* escaped, hence for file 
> access you can 
> perfectly use this character vector.
> 
> Uwe Ligges
> 
> 
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