Antwort: Re: Re: sink(): Cannot open file

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
10 North Greene Street
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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