Emm, my bad. I meant str <- "abc\d". Any ideas? On 14 May 2012 18:02, Baoqiang <bqcaom...@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.hu...@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.dun...@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/ >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code.
-- Wincent Ronggui HUANG Sociology Department of Fudan University PhD of City University of Hong Kong http://homepage.fudan.edu.cn/rghuang/cv/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.