No, but make.names only makes syntactically valid names of R object. I think I have mentioned what I did in the first email, although no concrete example was provided. Let me explain a bit. I have a text file like this,
Title:AA? Content: 1xxxxxx1 ------------ Title:BA Content: 2xxxxxx2 I want to read the file in, process it and export it into two separate files. 1. d:/output/AA.txt with content of 1xxxxxx1, and 2. d:/output/BA with content of 2xxxxxx2. The first file name is AA because I know "AA?" is not a valid file name in Windows and ? is removed. However, there are lots of files and it will be convenient if I can convert any invalid file name (like "AA?") into a valid file name (like "AA") automatically. >From the answers provided by this mailing list, it seems not easy to write a function to construct valid file names because what is a valid file name depends on the OS and prior knowledge is needed. Best On 10 May 2012 20:53, jim holtman <jholt...@gmail.com> wrote: > Has any mentioned > > ?make.names > > On Thu, May 10, 2012 at 8:39 AM, Wincent <ronggui.hu...@gmail.com> wrote: >> As I said, the file name is derived automatically from text processing. >> Thanks all the same. >> >> On 10 May 2012 20:35, Upton, Stephen (Steve) (CIV) <scup...@nps.edu> wrote: >>> Why not just construct a valid file name and use that in cat? You can then >>> use >>> file.path to join paths together if you want to write to a specific >>> location, >>> as in your example. >>> >>> steve >>> >>> -----Original Message----- >>> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On >>> Behalf Of Wincent >>> Sent: Wednesday, May 09, 2012 11:15 AM >>> To: Tal Galili >>> Cc: r help >>> Subject: Re: [R] file path >>> >>> Hmm, I don't think it gives what I want. >>> >>> For example, I assign a file name to f, >>>> f <- "a?b.txt" >>>> file.path("e:",f) >>> [1] "e:/a?b.txt" >>> >>> The resultant character is not accepted as a file name by Windows OS. >>> >>> On 9 May 2012 20:32, Tal Galili <tal.gal...@gmail.com> wrote: >>>> Hi Wincent, >>>> Have a look at: >>>> ?file.path >>>> >>>> >>>> >>>> ----------------Contact >>>> Details:------------------------------------------------------- >>>> Contact me: tal.gal...@gmail.com | 972-52-7275845 Read me: >>>> www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | >>>> www.r-statistics.com (English) >>>> ---------------------------------------------------------------------- >>>> ------------------------ >>>> >>>> >>>> >>>> >>>> On Wed, May 9, 2012 at 11:03 AM, Wincent <ronggui.hu...@gmail.com> 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? >>>>> >>>>> Best >>>>> >>>>> -- >>>>> 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. >> >> >> >> -- >> 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. > > > > -- > Jim Holtman > Data Munger Guru > > What is the problem that you are trying to solve? > Tell me what you want to do, not how you want to do it. -- 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.
