Deleting duplicate observations from a dataset

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Sebastiano delre
Sebastiano delre 2016-5-30
回答： Sebastiano delre 2016-5-31
I have a large dataset and I want to delete duplicate observations. I do not want to use the function unique because it compares all values of the variables and it is slow. I just want to use the variable PostID of the observations and delete duplicates. I attach a fraction of the dataset. Thank you for your help.

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采纳的回答

Walter Roberson
Walter Roberson 2016-5-30
unique(pieceDB, 'postID')

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Sebastiano delre
Sebastiano delre 2016-5-31
Wowwww, much easier than I expected. Thanks much!

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