[R] strange conversion char to date

[John Kane]

Maybe there is some built-in assumption about dating and when to change to the new century. It seems to kick-in at 1968

as.Date("25/04/69", "%d/%m/%y")

as.Date("25/04/68", "%d/%m/%y")

as.Date("25/04/60", "%d/%m/%y")

John Kane
Kingston ON Canada


> -----Original Message-----
> From: frans.marcelissen at digipsy.nl
> Sent: Fri, 30 Aug 2013 15:12:40 +0200
> To: r-help at r-project.org
> Subject: [R] strange conversion char to date
> 
> Hi R-friends,
> Can anyone explain the following strange behavior to me?
>> as.Date( "4/25/71","%m/%d/%y")
> [1] "1971-04-25"
>> as.Date( "4/25/62","%m/%d/%y")
> [1] "2062-04-25"
> 
> so 71 is converted to 1971, while 62 is converted to 2062? Does anyone
> know
> why? And is there a simple way to specify the date?
> (does works the same way in R 2.01 as well as in 1.9)
> 
> -------------------
> dr F.H.G. (Frans) Marcelissen
> DigiPsy (www.DigiPsy.nl <http://www.digipsy.nl/>)
> Pomperschans 26
> 5595 AV Leende
> tel: 040 2065030/06 2325 06 53
> skype adres: frans.marcelissen
> email: frans.marcelissen at digipsy.nl
> 
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