Michael, thanks a lot!
Really appreciate it - what wasn't hard for you would be for me!
Dimitri
On Thu, Aug 4, 2011 at 2:20 PM, R. Michael Weylandt
<michael.weyla...@gmail.com> wrote:
> You are getting 105 because the default behavior of findInterval is such
> that v[N+1] := + Inf (as noted in ? findInterval); that is, the last
> interval is actually taken to stretch from the final element of sbwl.dates
> unto eternity. It shouldn't be hard to write a catch line to set that to
> whatever you want for it to go to.
>
> E.g.,
>
> myFindInterval <- function(x, vec, rightmost.closed = FALSE, all.inside =
> FALSE) {
> FI = findInterval(x,vec,rightmost.closed, all.inside)
> FI[FI==length(vec)] <- 0 # or Inf or whatever
> return(FI)
> }
>
> Michael Weylandt
>
>
> On Thu, Aug 4, 2011 at 9:26 AM, Dimitri Liakhovitski
> <dimitri.liakhovit...@gmail.com> wrote:
>>
>> Sorry for renewing the topoic. I thought it worked but now I've run
>> into a little problem:
>>
>> # My data frame with dates for week starts (Mondays)
>> y<-data.frame(week=seq(as.Date("2009-12-28"),
>> as.Date("2011-12-26"),by="week") )
>>
>> # I have a vector of super bowl dates (including the future one for 2012):
>>
>> sbwl.dates<-as.Date(c("2005-02-06","2006-02-05","2007-02-04","2008-02-03","2009-02-01","2010-02-07","2011-02-06","2012-02-05"))
>> I want to find the weeks in y that contain super bowl dates for
>> applicable years. I am trying:
>> sbwl.weeks<-findInterval(sbwl.dates, y$week)
>> sbwl.weeks<-sbwl.weeks[sbwl.weeks>0]
>> (sbwl.weeks)
>> > 6 58 105
>> y$flag<-0
>> y$flag[sbwl.weeks]<-1
>>
>> 6 and 58 are correct. But why am I getting 105 (the last row)?
>> Any way to fix it?
>> Thanks a lot!
>> Dimitri
>>
>>
>>
>> On Tue, Aug 2, 2011 at 12:57 PM, Dimitri Liakhovitski
>> <dimitri.liakhovit...@gmail.com> wrote:
>> > Thanks a lot, everyone!
>> > Dimitri
>> >
>> > On Tue, Aug 2, 2011 at 12:34 PM, Dennis Murphy <djmu...@gmail.com>
>> > wrote:
>> >> Hi:
>> >>
>> >> You could try the lubridate package:
>> >>
>> >> library(lubridate)
>> >> week(weekly$week)
>> >> week(july4)
>> >> [1] 27 27
>> >>
>> >>> week
>> >> function (x)
>> >> yday(x)%/%7 + 1
>> >> <environment: namespace:lubridate>
>> >>
>> >> which is essentially Gabor's code :)
>> >>
>> >> HTH,
>> >> Dennis
>> >>
>> >> On Tue, Aug 2, 2011 at 7:36 AM, Dimitri Liakhovitski
>> >> <dimitri.liakhovit...@gmail.com> wrote:
>> >>> Hello!
>> >>>
>> >>> I have dates for the beginning of each week, e.g.:
>> >>> weekly<-data.frame(week=seq(as.Date("2010-04-01"),
>> >>> as.Date("2011-12-26"),by="week"))
>> >>> week # each week starts on a Monday
>> >>>
>> >>> I also have a vector of dates I am interested in, e.g.:
>> >>> july4<-as.Date(c("2010-07-04","2011-07-04"))
>> >>>
>> >>> I would like to flag the weeks in my weekly$week that contain those 2
>> >>> individual dates.
>> >>> I can only think of a very clumsy way of doing it:
>> >>>
>> >>> myrows<-c(which(weekly$week==weekly$week[weekly$week>july4[1]][1]-7),
>> >>> which(weekly$week==weekly$week[weekly$week>july4[2]][1]-7))
>> >>> weekly$flag<-0
>> >>> weekly$flag[myrows]<-1
>> >>>
>> >>> It's clumsy - because actually, my vector of dates of interest (july4
>> >>> above) is much longer.
>> >>> Is there maybe a more elegant way of doing it?
>> >>> Thank you!
>> >>> --
>> >>> Dimitri Liakhovitski
>> >>> marketfusionanalytics.com
>> >>>
>> >>> ______________________________________________
>> >>> R-help@r-project.org mailing list
>> >>> https://stat.ethz.ch/mailman/listinfo/r-help
>> >>> PLEASE do read the posting guide
>> >>> http://www.R-project.org/posting-guide.html
>> >>> and provide commented, minimal, self-contained, reproducible code.
>> >>>
>> >>
>> >
>> >
>> >
>> > --
>> > Dimitri Liakhovitski
>> > marketfusionanalytics.com
>> >
>>
>>
>>
>> --
>> Dimitri Liakhovitski
>> marketfusionanalytics.com
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>
--
Dimitri Liakhovitski
marketfusionanalytics.com
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