[R] Can strptime handle milliseconds or AM/PM?

[Prof Brian Ripley]

On 17/01/2013 07:59, e-letter wrote:
> Readers,
>
> Responding to an old post
> (http://tolstoy.newcastle.edu.au/R/e2/help/07/06/18850.html), and
> using the example in the manual:
>
> monthextract<-strptime("20/2/06 11:16:16.683", "%m")
> monthextract
> [1] NA
>
> Why is the result 'NA' and not '2'?

Because you have not specified a complete date-time, only month = 20 
(which is invalid).

The help page actually has

      z <- strptime("20/2/06 11:16:16.683", "%d/%m/%y %H:%M:%OS")

I guess you were looking for

strftime(z, "%m")

which gives "02" on my system (it may be platform-specific)

or

z$mon + 1

>
> --
> r2151
>
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-- 
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)
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