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meanbymsa
2007 Feb 07
1
Problem with subsets and xyplot
Hello
I have a dataframe that looks like this
MSA CITY HIVEST YEAR YR CAT
1 0200 Albuquerque 0.50 1996 1996 5
2 0520 Atlanta 13.00 1997 1997 5
3 0720 Baltimore 29.10 1994 1994 1
4 0720 Baltimore 13.00 1995 1995 5
5 0720 Baltimore 3.68