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tp3081226p3081226
2010 Dec 10
3
Delete observations with a frequency < x
Hi,
I have two columns with data (both identifiers - it's an affiliation list)
and I would like to delete the rows in which the observations in the second
column have a frequency < 5 in the entire second column. Example:
1 a
1 b
1 c
2 a
2 b
2 d
Let's say, I would like to delete the rows in which the observation in the
second column has a frequency < 2 in