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From | "Michael Blasnik" <michael.blasnik@verizon.net> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | st: Re: Keeping the Earliest Observations on Each Leg |
Date | Mon, 12 Jun 2006 20:00:52 -0400 |
<snip>>I am interested in keeping the earliest observations on each leg where left leg is denoted (lleg=1) and right leg (lleg=0). Can anyone assist? id date lleg 46 22aug1993 0 46 28sep1993 1 46 28sep1993 1
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