[R] sink() does not seem to release the file

[Peter Dalgaard BSA]

"BXC (Bendix Carstensen)" <bxc at novonordisk.com> writes:

> I run Win2000, and when I try to write to a file and later use it
> it seems that R 1.02.0 has a firm grip on it:

[Proof deleted]

This was on the R-devel list 2 weeks ago:

On Tue, 19 Dec 2000, Prof Brian D Ripley wrote:

> On Tue, 19 Dec 2000 Setzer.Woodrow at epamail.epa.gov wrote:
> 
> > When I use sink(filename) to save the results of the run, the file
> > does not seem to be closed or released back to the OS after I issue
> > the "sink()" command.  Here is a baby example:
> 
> sink works on connections, not files, as from 1.2.0.
> 
> > sink("test.txt")
> > tdta <- data.frame(x = x <- 0:10,y = 2 * x + rnorm(11))
> > 
> > print(summary(lm(y ~ x, data=tdta)))
> > sink()
> > 
> > At this point (even after refreshing the Explorer window) the filesize of
> > "test.txt" is listed as 0 bytes, and as long as Rgui is running, I
> > cannot delete the file.  Emacs cannot read the file (but Notepad can).  This happens both in the gui
> > and when the commands are in a file run via "source()".
> 
> Yes, but what is the bug exactly?  The connection is still open so you can
> switch output back to it.  If you want different behaviour, you can open a
> connection and close it yourself.  As in
> 
> zz <- file("test.txt", "w")
> sink(zz)
> tdta <- data.frame(x = x <- 0:10,y = 2 * x + rnorm(11))
> print(summary(lm(y ~ x, data=tdta)))
> sink()
> close(zz)

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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