[R] Help with dates

Simmering, Jacob E jacob-simmering at uiowa.edu
Thu Dec 28 21:54:57 CET 2017

Your dates have an incomplete year information with 34. R assumes that 00-68 are 2000 to 2068 and 69 to 99 are 1969 to 1999. See ?strptime and the details for %y. 

You can either append “19” to the start of your year variable to make it completely express the year or check if the date is in the future (assuming all dates should be in the past) and subtract 100 years from the date. 

> On Dec 28, 2017, at 11:13 AM, Ramesh YAPALPARVI <ramesh.yapalparvi at icloud.com> wrote:
> Hi all,
> I’m struggling to get the dates in proper format.
> I have dates as factors and is in the form 02/27/34( 34 means 1934). If I use
> as.Date with format %d%m%y it gets converted to 2034-02-27. I tried changing the origin in the as.Date command but nothing worked. Any help is appreciated.
> Thanks,
> Ramesh
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