Re: [R] Extracting week number starting from a specific date

Hello, Try # # Adapted from several posts to R-Help, # mostly by David Winsemius, also by Gabor Grothendiek. # nweek <- function(x, format="%Y-%m-%d", origin){ if(missing(origin)){ as.integer(format(strptime(x, format=format), "%W")) }else{ x <- as

[R] Extracting week number starting from a specific date

Hello, I have a list of dates, such as dates<- as.Date(c("1996-03-29","1996-05-30","1996-09-28","1996-05-09")) from which I would like to extract the week number for each date, with week n°1 being the week going from Dec 30th 1995 to Jan 6th 1996 ("1995-30-12" to "1996-06-01"). Any suggestion fo