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. ______________________________________________ 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.