Chris,

How large is large? How may columns?

"Duplicate" across all columns of just some?

Henrique gave you simple R answer. Perhaps doing in SQL is more efficient?
eg

SELECT DISTINCT
             <stuff>
  FROM <somewhere>;


HTH,
Jim Porzak
TGN.com
San Francisco, CA
www.linkedin.com/in/jimporzak
use R! Group SF: www.meetup.com/R-Users/


On Fri, Jun 5, 2009 at 9:38 AM, Chris Anderson <chris6764@netzero.net>wrote:

> I have a large dataset that contain duplicate records. How do I identify
> and remove duplicate records?
>
>
> Chris Anderson
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