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clou
2008 Jul 24
5
How to delete duplicate cases?
Dear R users,
I have a dataframe with lot of duplicate cases and I want to delete duplicate ones which have low rank and keep that case which has highest rank.
e.g
> df1
cno rank
1 1342 0.23
2 1342 0.14
3 1342 0.56
4 2568 0.15
5 2568 0.89
so I want to keep 3rd and 5th cases with highest rank (0.56 & 0.89) and delete rest of the duplicate cases.
Could