[R] Create directory and copy files in R

[Henrik Bengtsson]

See copyDirectory() in the R.utils package. /hb

On Tue, Sep 22, 2009 at 9:43 AM, Yihui Xie <xieyihui at gmail.com> wrote:
> You assigned values to 'fn' and 'dpath' outside the function body and
> use these names as the arguments of your function, so actually 'cyfun'
> does not know what 'fn' and 'path' are. The solution is to put them in
> the arguments as default values:
>
> cyfun <- function(fn = "C:/Documents and
> Settings/lma/Desktop/FamilyAEntrepreneurs/Entrepreneurs/Juha/book_log-20041210T095019.txt",
>    dpath = "C:/Documents and Settings/lma/My Documents/Juha/book") {
>    dir <- dirname(fn)
>    fn <- basename(fn)
>    deskdir <- dir.create(dpath)
>    file.copy(fn, deskfile)
> }
>
> But even if you have fixed this problem, I don't think you can
> successfully copy all the files under 'dir', as you've only copied a
> single file 'fn' to 'deskdir' (and as 'fn' is only a base name,
> probably this function will fail again if R does not know where is
> 'fn'!). To get the file list under 'dir', you may need
> list.files(dirname(fn), all.files = TRUE); then copy this file list to
> 'deskdir'.
>
> BTW, it's not a good programming habit to assign values to the names
> of internal R functions/objects, as you did in 'dir <- dirname(fn)'
> because 'dir' is already an R function.
>
>> library(fortunes)
>> fortune('dog')
>
> Firstly, don't call your matrix 'matrix'. Would you call your dog
> 'dog'? Anyway, it might clash
> with the function 'matrix'.
>   -- Barry Rowlingson
>      R-help (October 2004)
>
> Regards,
> Yihui
> --
> Yihui Xie <xieyihui at gmail.com>
> Phone: 515-294-6609 Web: http://yihui.name
> Department of Statistics, Iowa State University
> 3211 Snedecor Hall, Ames, IA
>
>
>
> On Mon, Sep 21, 2009 at 9:24 AM, Don MacQueen <macq at llnl.gov> wrote:
>> In your file.copy() command you have "deskfile", but "deskfile" does not
>> appear anywhere else. Perhaps you meant deskdir?
>>
>> After the error occurs, type
>>
>>  traceback()
>>
>> and try to discern exactly where things went wrong.
>>
>> -Don
>>
>> At 5:05 PM +0300 9/21/09, Tammy Ma wrote:
>>>
>>> Content-Type: text/plain
>>> Content-Disposition: inline
>>> Content-length: 792
>>>
>>>
>>>
>>> HI, All R users,
>>>
>>> My problem is:
>>>
>>>>  fn
>>>
>>> [1] "C:/Documents and
>>> Settings/lma/Desktop/FamilyAEntrepreneurs/Entrepreneurs/Juha/book_log-20041210T095019.txt"
>>>>
>>>>  dpath
>>>
>>> [1] "C:/Documents and Settings/lma/My Documents/Juha/book"
>>>
>>>
>>> I want to make  a function "cyfun" to copy all files in "dir" to "deskdir"
>>> but I always got the following problem:
>>>
>>> Error in file.exists(to) : invalid 'file' argument.
>>> Whats the problem??
>>>
>>>
>>>
>>>
>>> cyfun<-function(fn,dpath){
>>> dir<-dirname(fn)
>>> fn<-basename(fn)
>>>
>>> deskdir<-dir.create(dpath)
>>> file.copy(fn, deskfile)
>>>
>>> }
>>>
>>> Thanks!
>>>
>>> Tammy
>>>
>>> _________________________________________________________________
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>>
>>
>> --
>> --------------------------------------
>> Don MacQueen
>> Environmental Protection Department
>> Lawrence Livermore National Laboratory
>> Livermore, CA, USA
>> 925-423-1062
>>
>> ______________________________________________
>> R-help at 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 at 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.
>