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...get the levels problem, this happens: > data[1,3] [1] " 0" This time, it keeps it as a string. I can use as.numeric to fix it now, but I'm just curious as to why this happens. Thanks -- View this message in context: http://www.nabble.com/discarding-%27levels%27-tf2384152.html#a6645474 Sent from the R help mailing list archive at Nabble.com.