Armstrong, Whit wrote:
> dts <- c("2004-8-1","2004-10-1","2001-9-1")
> strptime(dts,"%Y-%m-%d")
> julian(strptime(dts,"%Y-%m-%d"))
>
>
>
Why do people insist on missing the obvious?
> x <- c("2004-8-1","2004-10-1","2001-9-1")
> as.Date(x) - as.Date("1960-1-1")
Time differences in days
[1] 16284 16345 15219
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On Behalf Of zhijie zhang
>> Sent: Thursday, September 13, 2007 8:19 AM
>> To: [EMAIL PROTECTED]
>> Subject: [R] handle dates in R?
>>
>> Dear Rusers,
>> I have some data in .csv file like "2004-8-1" and
>> "2004-10-1", and i need to convert them into days from the
>> origin (January 1, 1960).
>> I have tried the function date.mmddyyyy(), but cannot get it.
>> Anybody can show me how to handle the date data?
>> Thanks very much!
>>
>> My dataset like:
>> time
>> 2004-8-1
>> 2004-10-1
>> 2001-9-1
>> 2002-9-1
>>
>>
>> --
>> With Kind Regards,
>>
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>> :::::::::::::
>> [*************************************************************
>> **********]
>> Zhi Jie,Zhang ,PHD
>> Tel:86-21-54237149
>> Dept. of Epidemiology,School of Public Health,Fudan
>> University Address:No. 138 Yi Xue Yuan Road,Shanghai,China
>> Postcode:200032
>> Email:[EMAIL PROTECTED]
>> Website: www.statABC.com
>> [*************************************************************
>> **********]
>> oooO:::::::::
>> (..):::::::::
>> :\.(:::Oooo::
>> ::\_)::(..)::
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>>
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>>
>> ______________________________________________
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>> PLEASE do read the posting guide
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--
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c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
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