Re: [R] Week number calculation

If dd is of Date class then this code finds the number of days since May 1st of the same year and then does an integer divide by 7 plus 1 so that the if dd lies in May 1 - May 7 it returns 1 as the week number, etc. dd <- as.Date("2000-06-01") # sample input as.numeric(dd - as.Date(sub("-.*", "-05

[R] Week number calculation

R community, How could I extract the week number from a date vector (in class Date) such that week numbering (week 1...2...) begins (May 01) and ends (October 31) on the same specific dates each year? Thank you, Mike __ R-help@r-project.org mailing