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july
2011 Aug 02
3
identifying weeks (dates) that certain days (dates) fall into
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==...