[R] Antwort: Re: Re: sink(): Cannot open file

[John Sorkin]

George,
I do not know what operating system you are working with, but when I use sink() under windows, I need to specify a valid path which I don't see in your code. I might, for example specify:

sink("c:\myfile.txt")
 R code goes here
sink()

with the expectation that I would create a file myfile.txt that would contain the output of my R program.
 
John


John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
Baltimore VA Medical Center
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>>> <G.Maubach at weinwolf.de> 05/10/16 11:10 AM >>>
Hi Jim,

I tried:

sink("all.Rout")
try(log("a"))
sink()

The program executes without warning or error. The file "all.Rout" is 
begin created. Nothing will be written to it. The file is accessable 
rights after the execution of the program by notepad.exe.

The program

zz <- file("all.Rout", open = "wt")
sink(zz, type = "message")
try(log("a"))
sink()
close(zz)
unlink(zz)

creates the file, does not write anything to it and is not accessable 
after program execution in R with notepad.exe.

Any ideas what happens behind the szenes?

Kind regards

Georg




Von: Jim Lemon <drjimlemon at gmail.com>
An: G.Maubach at weinwolf.de, 
Kopie: r-help mailing list <r-help at r-project.org>
Datum: 10.05.2016 13:16
Betreff: Re: Re: [R] sink(): Cannot open file



Have you tried:

sink("all.Rout")
try(log("a"))
sink()

Jim

On Tue, May 10, 2016 at 9:05 PM, <G.Maubach at weinwolf.de> wrote:
> Hi Jim,
>
> thanks for your reply.
>
> ad 1)
> "all.Rout" was created in the correct directory. It exists properly with
> correct file properties on Windows, e.g. creation date and time and file
> size information.
>
> ad 2)
> I can not access the file with Notepad.exe directly after it was created
> by R. The error message is (translated):
>
> "Cannot access file "all.Rout". The file is opened by another process."
>
> ad 3)
> If I close R completely the file access is released. Then I can read the
> file using Notepad.exe. The contents is:
>
> Error in log("a") : non-numeric argument to mathematical function
>
> I tried
>
> close(zz)
>
> but the error persists.
>
> To me it looks like R is still accessing the file and not releasing the
> connection for other programs. close(zz) should have solved the problem
> but unfortantely it doesn't.
>
> What else could I try?
>
> Kind regards
>
> Georg
>
>
>
>
> Von: Jim Lemon <drjimlemon at gmail.com>
> An: G.Maubach at weinwolf.de,
> Kopie: r-help mailing list <r-help at r-project.org>
> Datum: 10.05.2016 12:50
> Betreff: Re: [R] sink(): Cannot open file
>
>
>
> Hi Georg,
> I don't suppose that you have:
>
> 1) checked that the file "all.Rout" exists somewhere?
>
> 2) if so, looked at the file with Notepad, perhaps?
>
> 3) let us in on the secret by pasting the contents of "all.Rout" into
> your message if it is not too big?
>
> At a guess, trying:
>
> close(zz)
>
> might get you there.
>
> Jim
>
> On Tue, May 10, 2016 at 5:25 PM, <G.Maubach at weinwolf.de> wrote:
>> Hi All,
>>
>> I would like to route the output to a file using sink(). When using the
>> example from the ?sink documentation:
>>
>> sink("sink-examp.txt")
>> i <- 1:10
>> outer(i, i, "*")
>> sink()
>> unlink("sink-examp.txt")
>>
>> ## capture all the output to a file.
>> zz <- file("all.Rout", open = "wt")
>> sink(zz)
>> sink(zz, type = "message")
>> try(log("a"))
>> ## back to the console
>> sink(type = "message")
>> sink()
>> file.show("all.Rout")
>>
>> I can not open the file in Windows Explorer. The error message is:
>>
>> "Cannot open file. File is in use be another proces."
>>
>> How can I close the file in a manner that I can open it right after it
> was
>> created?
>>
>> Kind regards
>>
>> Georg
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>

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