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...or" "numeric" "numeric" "numeric" Is there a way to change that? Thank you very much. PS: the levels for fruit and veget are intact or removed -- View this message in context: http://www.nabble.com/wroung-groupedData-despite-reading-Bates-and-Pinheiro-3-times-tp18548213p18548213.html Sent from the R help mailing list archive at Nabble.com.