I guess your problem is that you cannot write toplevel into "c:\" with
your permissions?
Best,
Uwe Ligges
On 16.12.2013 16:40, John Karon wrote:
Thanks for pointing out my error after specifying the destination in the
file( ) function. What you proposed also did not work.
It turns out the solution is to give the file name but not include the
path; the resulting file is written in the working directory.
The mystery is that including the path had previously work.
John Karon
-----Original Message----- From: Uwe Ligges
Sent: Sunday, December 15, 2013 12:30 PM
To: John Karon ; r-help@r-project.org
Subject: Re: [R] Invalid connection error message when trying to write a
file
On 15.12.2013 20:13, John Karon wrote:
The response below asks what I actually did.
I defined a function (details omitted; it computes the data frame
LRtest.out); arguments include "path\\filename.csv" to which I want to
write a data frame using write.csv( ). Repeated executions of the
function (without the file( ) and close( ) instructions) were
successful until 2 days ago, when I received the error message below. I
simplified the code to write a file and received the error message below
(same message as before) in response to the commands
zz<-file(description="c:\\LRtest.txt","w")
write.table(LRtest.out, file="c:\\LRtest.txt", sep="\t")
close(zz)
Wrong, *either* use
write.table(LRtest.out, file="c:\\LRtest.txt", sep="\t")
or
zz <- file(description="c:\\LRtest.txt","w")
write.table(LRtest.out, file=zz, sep="\t")
close(zz)
Best,
Uwe Ligges
Error in file(description = "c:\\LRtest.txt", "w") :
cannot open the connection
In addition: Warning message:
In file(description = "c:\\LRtest.txt", "w") :
cannot open file 'c:\LRtest.txt': Permission denied
This happens whether there is no previous file with that name or an
essentially empty file with that name. In previous executions of code
with a path to a folder, executing the file( ) command would create an
empty file. Now no empty file is created. The problem persists after
rebooting the computer.
I also tried writing to the clipboard (description ="clipboard" in the
file( ) command); that was unsuccessful, with file="clipboard" or no
file statement in the write.table( ) command (Word showed there was
something to paste, but pasting into an empty Word document did not put
text into the document; with no file statement, the data frame was
written to the console).
I question whether there is a setting that forbids writing to a file.
Information on putting the data frame on the clipboard would also help.
Thanks for any help. John Karon
-----Original Message----- From: Uwe Ligges
Sent: Saturday, December 14, 2013 10:05 AM
To: J Karon ; r-help@r-project.org
Subject: Re: [R] Invalid connection error message when trying to write a
file
On 13.12.2013 20:11, J Karon wrote:
I get an invalid connection method error message when trying to write
an R
object from a user-defined function to my hard drive (running Windows 7)
using write.csv. I have previously not had this problem with the same
user-defined function. The error message is
Error in isOpen(file, "w") : invalid connection
In addition: Warning message:
In if (file == "") file <- stdout() else if (is.character(file)) { :
the condition has length > 1 and only the first element will be used
Using
zz<-file(description="path","w")
write.csv( )
close(zz)
creates an empty file but yields the same error message when I execute
write.csv.
Please tell us what you actually did.
This works for me:
zz <- file(description="path", "w")
write.csv(iris, zz)
close(zz)
Best,
Uwe Ligges
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and provide commented, minimal, self-contained, reproducible code.
