On Tue, 1 Mar 2011, Seth W Bigelow wrote:
I would like to use POSIX classes to store dates and extract components of
dates. Following the example in Spector ("Data Manipulation in R"), I
create a date
mydate = as. POSIXlt('2005-4-19 7:01:00')
I then successfully extract the day with the command
mydate$day
[1] 19
But when I try to extract the month
> mydate$mon
[1] 3
it returns the wrong month. And mydate$year is off by about 2,000 years.
Am I doing something wrong?
Not reading the documentation (nor the posting guide).
?DateTimeClasses says
‘mon’ 0-11: months after the first of the year.
‘year’ years since 1900.
That is the POSIX standard ... you could also have looked there.
Dr. Seth W. Bigelow
Biologist, USDA-FS Pacific Southwest Research Station
1731 Research Park Drive, Davis California
sbige...@fs.fed.us / ph. 530 759 1718
[[alternative HTML version deleted]]
Please note what the posting guide said about that!
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Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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