[R] file path

[Wincent]

Emm, my bad.
I meant str <- "abc\d".
Any ideas?

On 14 May 2012 18:02, Baoqiang <bqcaomail at gmail.com> wrote:
> 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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-- 
Wincent Ronggui HUANG
Sociology Department of Fudan University
PhD of City University of Hong Kong
http://homepage.fudan.edu.cn/rghuang/cv/