Query about use of format in strptime
Hi Stefano, As the help page says: "The default for the format methods is "%Y-%m-%d %H:%M:%S" if any element has a time component which is not midnight, and "%Y-%m-%d" otherwise. This is because when the result is printed, it uses the default format. If you want a specified output representation: format(strptime(init_day, format="%Y-%m-%d-%H-%M"),"%Y-%M-%d %H:%M") [1] "2015-30-24 00:30" For the "midnight" case: format(strptime(init_day, format="%Y-%m-%d-%H-%M"),"%Y-%m-%d %H:%M") [1] "2015-02-24 00:00" Jim On Mon, Apr 11, 2016 at 5:22 PM, Stefano Sofia
<stefano.sofia at regione.marche.it> wrote:
Dear R-list users,
I need to use strptime because I have to deal with date with hours and minutes.
I read the manual for strptime and I also looked at many examples, but when I try to apply it to my code, I always encounter some problems.
I try to change the default format, with no success. Why? How can I change the format?
1.
init_day <- as.factor("2015-02-24-00-30")
strptime(init_day, format="%Y-%m-%d-%H-%M")
[1] "2015-02-24 00:30:00"
It works, but why also seconds are shown if in format seconds are not specified?
2.
init_day <- as.factor("2015-02-24-0-00")
strptime(init_day, format="%Y-%m-%d-%H-%M")
[1] "2015-02-24"
Again, the specified format is not applied. Why?
Thank you for your attention and your help
Stefano
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