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st: how to keep maximum value


From   "FUKUGAWA, N." <nfukugawa@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: how to keep maximum value
Date   Mon, 25 Sep 2006 10:33:29 +0900

Dear all,
Suppose we have data as follows,

year	var1
1997	14	
1997	32	
1997	19		
1998	18	
1998	42		
1998	50		
1999	3	
1999	23	
1999	37	

we want to keep observations by year if var1 is maximum within
the same year.

year	var1
1997	32	
1998	50		
1999	37	

How can I do this using stata9?
Thank you in advance.
---
FUKUGAWA Nobuya, Ph.D.
nfukugawa@gmail.com
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