[R] file path

[Baoqiang]

This works on Mac:

str <- "abc/d"
gsub("/", "", str)

Return:
"abcd"


Sent from my iPhone

On May 14, 2012, at 4:28 AM, Wincent <ronggui.huang at gmail.com> wrote:

> Thanks for the suggestion. The file name in my case is Chinese, which
> makes the regular expression less useful.
> 
> Anyway, I would like to pose a followup question.
> I have a character string of "ABC\D", and want to strip away the "\"
> and want a returned character of "ABCD". How can I do it with gsub() ?
> 
> Thanks again.
> 
> On 9 May 2012 22:40, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
>> On 09/05/2012 4:03 AM, Wincent wrote:
>>> 
>>> Dear all, is there any function to assert whether a file path is
>>> legitimate, and to convert any potential file path to a legitimate
>>> file path?
>>> 
>>> I automate a batch of files and write them to plain text files with
>>> cat(). The file argument of cat() is generated automatically which may
>>> contain characters such as ?<  >, unacceptable in Windows OS. What I
>>> do at this moment is to strip such characters off with gsub(). Is
>>> there any direct way to make legitimate file path without detailed
>>> knowledge about the naming rule specific to a OS?
>> 
>> 
>> I would just try to create the file, and if you fail, it's not legitimate.
>>  Alternatively, you could look at the tests that R uses when it checks a
>> package:  we try to keep filenames portable to all operating systems.  The
>> rules seem to be strictest for vignettes:
>> 
>>        ## we specify ASCII filenames starting with a letter in R-exts
>>        ## do this in a locale-independent way.
>>        OK <-
>> grep("^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz][ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-]+$",
>> vignettes)
>> 
>> Duncan Murdoch
>> 
>> 
> 
> 
> 
> -- 
> Wincent Ronggui HUANG
> Sociology Department of Fudan University
> PhD of City University of Hong Kong
> http://homepage.fudan.edu.cn/rghuang/cv/
> 
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