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'? -- r2151
Can strptime handle milliseconds or AM/PM?
2 messages · e-letter, 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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