[R] Get current time in numeric form?

[Prof Brian Ripley]

> From: Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk>
> Date: 23 Jan 2001 14:24:38 +0100
> 
[...]

> Just to complete the discussion on date parsing,
> 
> unclass(as.POSIXct(strptime(date(),"%c"))) 
> 
> or
> 
> as.POSIXct(strptime(date(),"%c")) - structure(0,class="POSIXct")
> 
> gives the time in seconds since the beginning of time() (generally Jan
> 1 1970 0:00:00 GMT on Unixen).

It is easier to use unclass(Sys.time()), which gives this directly.
The base is always `the epoch', as given by Peter.  Unless your clock
is set wrong (possible) that should be the correct value, the problem
being the conversions done in printing it.

> However, I think proc.time()[3] is more relevant for your needs. 

It is higher accuracy too (ca 0.01 secs).

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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