R help - Apr 2008 - strptime format argument

I am getting an unanticipated result attempting to format a datetime
string
 
date1 <- strptime('2005 297 1030 35', '%Y %j %H%M %S')     #
returns
"2005-10-24 10:12:35"
date2 <- strptime('2005 297 912 35', '%Y %j %H%M %S')      #
returns NA
 
Are there any ways to adjust the format argument (e.g., '%H') to accept
one or two digit hours?
 
Thanks in advance,

Dave
 

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On Mon, 28 Apr 2008, Hutchinson,David [PYR] wrote:
> I am getting an unanticipated result attempting to format a datetime
> string
>
> date1 <- strptime('2005 297 1030 35', '%Y %j %H%M %S')  
# returns
> "2005-10-24 10:12:35"
> date2 <- strptime('2005 297 912 35', '%Y %j %H%M %S')   
# returns NA
>
> Are there any ways to adjust the format argument (e.g., '%H') to
accept
> one or two digit hours?
That's not the issue:
> strptime('2005 297 9 12 35', '%Y %j %H %M %S')
[1] "2005-10-24 09:12:35"

The issue is that 91 is an invalid value for %H -- it reads from left to 
right
> strptime('2005 297 112 35', '%Y %j %H%M %S')
[1] "2005-10-24 11:02:35"

You will need to preprocess the string if you want another interpretation.

-- 
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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