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st: how to aggregate data
From
fukugawa_nobuya <[email protected]>
To
[email protected]
Subject
st: how to aggregate data
Date
Wed, 02 Nov 2011 17:17:32 +0900
dear statalisters,
i would like to know how to compress the original data as follows.
---original data---
firm year age
a 1999 19
a 1999 25
b 1998 65
c 2010 56
c 2010 58
c 2010 54
---aggregated data---
firm year age
a 1999 22
b 1998 65
c 2010 56
please note the number of rows will be reduced.
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