[R] Schedule R function/Code to run at specific time

[MacQueen, Don]

Everything Duncan said, plus:

A construction like this might do the job

run.at <- as.POSIXct('2015-02-26 13:05')
while(TRUE) {
  if ( trunc(Sys.time(),'min') == run.at) source('whatever-it-is.r')
  Sys.sleep(60)
}


but I wouldn't count on it to be as reliable as cron (or Windows
equivalent).

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 2/26/15, 11:20 AM, "Duncan Murdoch" <murdoch.duncan at gmail.com> wrote:

>On 26/02/2015 2:08 PM, Doran, Harold wrote:
>> Is there functionality within R proper, without having to revert to the
>>OS, allowing a function or a portion of an R script to be run at a
>>defined time? My google searches haven't provided much other than one at
>>the link below which relies on an OS.
>
>If you want it to start 1000 seconds from now, use Sys.sleep(1000) as
>your first statement.  You'll have a process sitting there using no CPU
>(but perhaps lots of virtual memory) until the sleeping is done.  Using
>cron is better.
>
>Duncan Murdoch
>
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