Re: [R] question about date's

From: ronggui <042045003_at_fudan.edu.cn>
Date: Mon 12 Dec 2005 - 23:23:12 EST


> x<-as.Date(c("2005-07-01", "2005-07-02","2005-07-03","2005-07-04","2005-07-05"))
> weekdays(x)

[1] "星期五" "星期六" "星期日" "星期一" "星期二"

> months(x)

[1] "七月" "七月" "七月" "七月" "七月"

>Thanks!
>That solves my problem for year numbers and month numbers
>Any idea how to do this for week numbers?
>
>Regards,
>Richard
>
>On 12/12/05, ronggui <042045003@fudan.edu.cn> wrote:
>> This is one way to do it.
>> > x<-c("2005-07-01", "2005-07-02","2005-07-03","2005-07-04","2005-07-05")
>> > x
>> [1] "2005-07-01" "2005-07-02" "2005-07-03" "2005-07-04" "2005-07-05"
>> > substr(x,1,4)
>> [1] "2005" "2005" "2005" "2005" "2005"
>> > substr(x,6,7)
>> [1] "07" "07" "07" "07" "07"
>> > substr(x,9,10)
>> [1] "01" "02" "03" "04" "05"
>> >
>>
>>
>> ======= 2005-12-12 20:06:00 您在来信中写道:=======
>>
>> >Hi,
>> >
>> >Given a frame with calendar date's:
>> >
>> >"2005-07-01", "2005-07-02","2005-07-03","2005-07-04","2005-07-05",etc.
>> >
>> >I want to extract the following from these dates:
>> >
>> >week number
>> >month number
>> >year number
>> >
>> >Any ideas how to accomplish this?
>> >
>> >Many thanks.
>> >
>> >Regards,
>> >Richard
>> >
>> >______________________________________________
>> >R-help@stat.math.ethz.ch mailing list
>> >https://stat.ethz.ch/mailman/listinfo/r-help
>> >PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>>
>> = = = = = = = = = = = = = = = = = = = =
>>
>>
>>
>>
>>
>> 2005-12-12
>>
>> ------
>> Deparment of Sociology
>> Fudan University
>>
>> My new mail addres is ronggui.huang@gmail.com
>> Blog:http://sociology.yculblog.com
>>

2005-12-12



Deparment of Sociology
Fudan University

My new mail addres is ronggui.huang@gmail.com Blog:http://sociology.yculblog.com



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Mon Dec 12 23:39:05 2005

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