Hi, Check for the additional "%" in your code "%d%". as.Date(strDates,"%m/%d/%Y") #[1] "1965-01-05" "1975-08-16" A.K.
On Sunday, March 9, 2014 12:16 PM, Hermann Norpois <hnorp...@gmail.com> wrote: Hello, I have some problems with as.Date. strDates <- c ("01/05/1965", "08/16/1975") dates <- as.Date (strDates, "%m/%d%/%Y") dates [1] NA NA # I expected my dates. What was going wrong? Thanks Hermann [[alternative HTML version deleted]] ______________________________________________ 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. ______________________________________________ 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.