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...- xkj| where i = 1 to 3 and j = 1 to 10 It looks as if a double FOR loop would work, but can the apply function work? Or some other function that is shorter than a FOR loop? Thank you, I hope this makes sense. Derek -- View this message in context: http://www.nabble.com/Avoiding-FOR-loops-tp14656517p14656517.html Sent from the R help mailing list archive at Nabble.com.