> Also, if we make days a list, the class attributes are kept when looping > over the list, ie. > > days<- list( as.Date( c("2000-01-01", "2000-01-02") ) )
Do you realise that that's a list with length one? I suspect you want days <- as.list( as.Date( c("2000-01-01", "2000-01-02") ) ) for (day in days) { print(day) } Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.