Re: [R] Suppressing output (e.g. from cat)

From: hadley wickham <h.wickham_at_gmail.com>
Date: Tue, 24 Jun 2008 15:03:24 +0200

>> Or:
>>
>> tc <- textConnection(NULL, "w")
>> sink(tc)
>> ...
>> sink()
>> close(tc)
>
> That is a lot more expensive and subject to
>
> o Use of textConnection(NULL, mode="w") could segfault.
>
> (NEWS for 2.7.1). Output textConnections are convenient, but have quite a
> lot of overhead since they need to keep the character vector current.

That's true and I hadn't considered the speed issue. It would be nice to have an analogue to capture.output though. Maybe:

quiet <- function(x) {
  sink(tempfile())
  on.exit(sink())
  invisible(force(x))
}

?

Hadley

-- 
http://had.co.nz/

______________________________________________
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.
Received on Tue 24 Jun 2008 - 13:11:06 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Tue 24 Jun 2008 - 16:30:47 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive