as.POSIXct() works fine (finally!) Thanks a lot David&Petr for your help! -- View this message in context: http://r.789695.n4.nabble.com/Problems-plotting-and-regression-w-r-t-date-data-type-on-x-axis-tp4658518p4658537.html Sent from the R help mailing list archive at Nabble.com.