Hi Jeff, As I'm sure you realize, that only tells you whether a date is within the range that you have specified. Do you only want to find dates within a certain range:
new_date<-as.Date("2020-01-10") new_date < min(d) | new_date > max(d) or maybe whether the text string specifying the date is NA or cannot be converted to a date? Jim On Thu, Jan 16, 2020 at 8:28 AM Jeff Reichman <reichm...@sbcglobal.net> wrote: > > R-help Forum > > I have a 20 year data set and I am looking for a way to find missing dates. > I wrote this and its works, but am wounding if there is a better way? > > d <- c('2020-01-01', '2020-01-02', '2020-01-04', '2020-01-05') > d <- as.Date(d) > date_range <- seq(min(d), max(d), by = 1) > date_range[!date_range %in% d] > > > Sincerely > > Jeff Reichman > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.