On Wed, 20 Jun 2007, Sérgio Nunes wrote: > Hi, > > What's the best way to average dates? > I though mean.POISXct would work fine but... > > > a > [1] "2007-04-02 19:22:00 WEST" > > b > [1] "2007-03-17 16:23:00 WET" > > class(a) > [1] "POSIXt" "POSIXct" > > class(b) > [1] "POSIXt" "POSIXct" > > mean(a,b) > [1] "2007-04-02 19:22:00 WEST" > > mean(b,a) > [1] "2007-03-17 16:23:00 WET"
Would you usually call mean() in this way? mean(1, 2) mean(2, 1) Probably not... mean() expects a vector, try mean(c(a, b))! Z > ?! > > Thanks in advance for any advice, > -- > Sérgio Nunes > > ______________________________________________ > R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.