On 12 June 2007 at 16:54, Earl F. Glynn wrote:
| Any clues what I'm doing wrong with strptime? This seems to fail the same
| way under Linux or Windows.
|
| For ?strptime would it make sense to explain %OS3 somewhere besides the
| Examples?
|
| > # Why does %OS3 work here?
| > format(Sys.time(), "%H:%M:%S")
| [1] "16:45:19"
| > format(Sys.time(), "%H:%M:%OS3")
| [1] "16:45:19.477"
I usually get good results with just '%OS' for fractional seconds. First,
make sure you do display fractional seconds which I do via
'options("digits.secs"=7) in ~/.Rprofile:
> getOption("digits.secs")
[1] 7
Then a simple example:
> now <- Sys.time()
> strptime(now, "%Y-%m-%d %H:%M:%OS")
[1] "2007-06-12 17:44:16.779577"
>
As per help("strptime"), what you tried should work
Specific to R is '%OSn', which for output gives the seconds to '0
<= n <= 6' decimal places (and if '%OS' is not followed by a
digit, it uses the setting of 'getOption("digits.secs")', or if
that is unset, 'n = 3'). Further, for 'strptime' '%OS' will input
seconds including fractional seconds.
but doesn't for me either:
> strptime(now, "%Y-%m-%d %H:%M:%OS6")
[1] NA
> strptime(now, "%Y-%m-%d %H:%M:%OS3")
[1] NA
>
Looks like a bug. But easy enough to circumvent if you just drop the 'n'.
Hth, Dirk
--
Hell, there are no rules here - we're trying to accomplish something.
-- Thomas A. Edison
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