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steves
2011 Sep 21
1
identifying cells in data frames with the same value
...Number, WorkerID, Age. I know the one person must have taken the
survey more than once, because there is one less level in the WorkerID
column than there are rows in the data frame. Is there something that will
tell me which SubjectNumber cells correspond to more than one WorkerID cell?
Thanks,
Stevesp
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