I get this message "character string is not in a standard unambiguous format" and if I try to use a zoo object "Error en `$.zoo`(final, V2) : not possible for univariate zoo series" cheers -- View this message in context: http://r.789695.n4.nabble.com/remove-rows-tp2328312p2328487.html Sent from the R help mailing list archive at Nabble.com.