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I have a problem with comparing dates. i tried it like "datesub = subset(data, 2012-11-19 < data$date)", but this doesn't work and i don't know why. Hope you can help me. here are my files: http://uploaded.net/file/n9sxdm0v <http://uploaded.net/file/n9sxdm0v> -- View this message in context: http://r.789695.n4.nabble.com/Date-Comparing-Problem-tp4676739.html Sent from the R help mailing list archive at Nabble.com.