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...names. By the way, I have a fairly large data set, with some variables occurring at 2 time points and other variables occurring at 20 time points. Thanks for your help! -- View this message in context: http://r.789695.n4.nabble.com/Reshaping-data-from-wide-to-tall-format-for-multilevel-modeling-tp3796168p3796168.html Sent from the R help mailing list archive at Nabble.com.