Dear R Experts:


   I am trying to convert a date and time character field to timeDate where the month is presented as three letters, such as "JUN" for June, etc. 


This is an example of the full character field:


"04-MAY-11 1428"
What is the proper format syntax?


I've tried

timeDate("04-MAY-11 1428",format="%d-%m-%y %H%M")
but only get

GMT
[1] [NA]
If I change the month to a number as below, then it works, but that would require recoding of the data field.



timeDate("04-05-11 1428",format="%d-%m-%y %H%M")

gives

GMT
[1] [2011-05-04 14:28:00]
which is correct.  How do I get R to recognize the month as a 3 letter designator.


Any recommendations you can provide would be greatly appreciated.


Michael


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