Can someone help me to produce a table that counts the number of unique
occurrences of a group inside another group?
For example assume I had the following table:
Number State County
1 NY Madison
2 NY Madison
3 PA Somerset
4 NY Oneida
5 PA Somerset
6 PA Wayne
7 PA Luzerne
I want to produce a table like this:
State County
NY 2
PA 3
Any ideas?
Ben
Ben Hoen
Principal Research Associate
Lawrence Berkeley National Laboratory
Office: 845-758-1896
Cell: 718-812-7589
bhoen@lbl.gov
http://eetd.lbl.gov/ea/emp/staff/hoen.html
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