I am trying to write S4 methods with "difftime" in the signature but am being "informed" (? not a warning or error) that "difftime" is not a class. Nevertheless, dispatch takes place. Should I simply ignore that "information"? Here is a toy example:
> setClass("foo", contains = "Date") > setMethod("+", c("foo", "difftime"), function(e1, e2) callNextMethod()) in method for ‘+’ with signature ‘"foo","difftime"’: no definition for class “difftime” [1] "+" > x <- new("foo", as.Date("2013-06-30")) > dt <- as.difftime(1, units = "days") > x + dt [1] "2013-07-01" Thank you, Dan Murphy ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel