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Answers and rating deltas for

Why does R change the variable type when appending NA values to a data frame with factors?

Author Votes Δ
Josh O'Brien 9 +1.21
nograpes 3 +0.88
eddi 3 +0.61
josliber 2 -0.41
Matthew Plourde 0 -1.94
Last visited: Sep 14, 2014, 5:07:29 AM