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Re: st: Re: Keeping the Earliest Observations on Each Leg


From   "Raphael Fraser" <raphael.fraser@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Keeping the Earliest Observations on Each Leg
Date   Mon, 12 Jun 2006 20:08:43 -0500

Thanks much! Micheal

On 6/12/06, Michael Blasnik <michael.blasnik@verizon.net> wrote:
bysort id lleg (date): keep if _n==1

note: any ties on date will be rboken arbitrarily

Michael Blasnik
michael.blasnik@verizon.net

----- Original Message -----
From: "Raphael Fraser" <raphael.fraser@gmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Monday, June 12, 2006 7:11 PM
Subject: st: Keeping the Earliest Observations on Each Leg


>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
<snip>>

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