[R] Alternative to extended recode sintax? Bug?

[Luca Meyer]

Right, I appreciate the first day of the year start date. I am just wondering why then the cut off day is not the same for the rest of the year...but it's all right to use other packages.
Thanks,
Luca

Il giorno 20/dic/2010, alle ore 14.16, David Winsemius ha scritto:

> 
> On Dec 20, 2010, at 12:54 AM, Luca Meyer wrote:
> 
>> All right, I get it now: lubridate's week() define weeks from Thursday till the following Wednesday. You'd probably agree with me that it's a bit strange what it is going to do over the turn of the year:
>> 
>>> y <- as.POSIXct(c("2010-12-27","2010-12-28","2010-12-29","2010-12-30","2010-12-31","2011-01-01","2011-01-02","2011-01-03","2011-01-04","2011-01-05","2011-01-06","2011-01-07","2011-01-08","2011-01-09","2011-01-10","2011-01-11","2010-01-12","2010-01-13","2010-01-14"))
>>> week(y)
>> [1] 52 52 52 53 53  1  1  1  1  1  1  2  2  2  2  2  2  2  3
>> 
>> Why would the first week of the year be made of 6 days and the turn from week 1 to week 2 on the night between Thursday and Friday and not Wednesday and Friday like every other week?
> 
> weeks in lubridate start on whatever day of the week is the first of that year.
> 
> If you want a Monday starting day (or the option to change to another starting day), then package chron has such facilities.
> 
> 
>> 
>> Cheers,
>> Luca
>> 
>> 
>> 
>> Il giorno 19/dic/2010, alle ore 18.14, Uwe Ligges ha scritto:
>> 
>>> 
>>> 
>>> On 19.12.2010 13:20, David Winsemius wrote:
>>>> 
>>>> On Dec 19, 2010, at 5:11 AM, Luca Meyer wrote:
>>>> 
>>>>> Something goes wrong with the week function of the lubridate package:
>>>>> 
>>>>>> x= as.POSIXct(factor(c("2010-12-15 17:28:27",
>>>>> + "2010-12-15 17:32:34",
>>>>> + "2010-12-15 18:48:39",
>>>>> + "2010-12-15 19:25:00",
>>>>> + "2010-12-16 08:00:00",
>>>>> + "2010-12-16 08:25:49",
>>>>> + "2010-12-16 09:00:00")))
>>>>>> require(lubridate)
>>>> 
>>>>>> weekdays(x)
>>>>> [1] "Mercoledì" "Mercoledì" "Mercoledì" "Mercoledì" "Giovedì"
>>>>> "Giovedì" "Giovedì"
>>>>>> week(x)
>>>>> [1] 50 50 50 50 51 51 51
>>>> 
>>>> But 2010-12-15 is a Wednesday and 2010-12-16 is a Thursday.
>>>> 
>>> 
>>> 
>>> Together with the description of ?week this shows that lubridate's week() function works as documented rather than as expected by Luca Meyer.
>>> 
>>> Uwe Ligges
>> 
> 
> David Winsemius, MD
> West Hartford, CT
>