For information, the R-devel version of R now has an experimental function
setTimerLimit() to set time limit(s) (elapsed and/or CPU) for each
top-level function. It will be a while before (or even if) it is
released, but it may prove useful to those with an immediate need.
On Wed, 2 Apr 2008, Prof Brian Ripley wrote:
On Wed, 2 Apr 2008, Duncan Murdoch wrote:
On 4/2/2008 12:00 PM, Lukas Rode wrote:
Dear Bert and Mel,
thanks for your help, but I'm afraid this doesn't solve my problem.
As I wrote in my previous mail (cf quote below) in most cases I will not
be
able to modify the code of the function that I want to run. This is why I
was asking for a wrapper solution similar to what tryCatch does. I have
hinted at a very inelegant version that generates a new R process for each
function run and kills the process after a given time. But I'm sure there
must be something more elegant. I hope I have been clear enough in my
problem description.
On some systems (not Windows) you could ask some external process to
send a signal after a certain time interval, and I believe you can write
you code to recover afterwards. I don't know any reasonable way to do
this on Windows.
The problem is that only drastic signals will get listened to, and I don't
believe they allow you to do anything other than save your work. SIGKILL,
SIGTERM, SIGUSR1 and SIGUSR2 are those likely to work (see ?Signals).
Philippe Grosjean said
You should look at AutoIt or Autohotkey for this.
I don't see how that helps. R will not respond to keys when running a
function, including the interrrupt key, unless written to do so. So on
Windows if the long-running code is predominantly R (and not compiled C or
Fortran) and is running from Rgui or interative Rterm (unlikely) then
pressing ESC/Ctrl-C should interrupt fairly soon.
But almost certainly one is using a batch process. You can kill that from an
external process on Windows (but not via SIGUSR1/2, although I think that is
a non-implementation detail).
I do this by running multiple processes and setting a CPU limit on them from
the shell used to launch them. By using 'make -j' I can control how many run
at once (important on multi-CPU machines).
Duncan Murdoch
Thanks again,
Lukas
Here is what I wrote before:
Note that mostly these functions are not written by me and not R code
(like
nlme for example), so it is not feasible to adapt the function itself.
Rather, it needs to be a wrapper around the function, similar to tryCatch.
On Wed, Apr 2, 2008 at 5:23 PM, mel <[EMAIL PROTECTED]> wrote:
Lukas Rode a écrit :
Nowever, with regard to #2, I am lost. I would like to set a maximum
time
limit (say, 1 minute) and if my procedure is still running then, I would
like to move on to the next model.
begin_time = as.difftime(format(Sys.time(), '%H:%M:%S'), units='secs');
for(...)
{
...
current_time = as.difftime(format(Sys.time(), '%H:%M:%S'),
units='secs');
delay = current_time - begin_time;
if (delay>60) return();
}
a counter may also be enough
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PLEASE do read the posting guide
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______________________________________________
R-help@r-project.org mailing list
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and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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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.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
R-help@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.
