Hi all, I'm dealing with dates in R (2.7.2), but some basic operations raise a warning.
Incompatible methods ("+.Date", "Ops.difftime") for "+" I saw this topic in this mailing list, but I do not understand what to do... cf. https://stat.ethz.ch/pipermail/r-help/2008-June/165842.html Do I have to convert Dates to numeric? Thanks in advance Christophe PS : R script used alpha2=as.Date("2008-12-21") alpha1=as.Date("2008-12-21")-as.Date("2008-10-26") alpha1 alpha2 alpha1+alpha2 [[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.