df = structure(list(t = structure(c(1033963406.044, 1033974144.847, + 1033988418.836), class = c("POSIXt", "POSIXct"))), .Names = "t", row.names = c(NA, + 3L), class = "data.frame") df$min = trunc(df$t,units="mins")
does not work, Jeff; you will see that my original post suggests familiarity with 'trunc' :) -- View this message in context: http://r.789695.n4.nabble.com/Lost-in-POSIX-tp3052768p3163914.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.