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RE: st: RE: Understanding the difference between gen and egen
From
Richard Williams <[email protected]>
To
[email protected]
Subject
RE: st: RE: Understanding the difference between gen and egen
Date
Wed, 14 Jun 2006 09:31:49 -0500
At 03:14 AM 6/14/2006, Nick Cox wrote:
I think that may understate egen's value a bit. True, as far as
typing goes, it may sometimes only save you a line or two. But for
many people it will also save the several hours it would take to
figure out what those two or three lines would be!I am not knocking -egen-. I may be its greatest
fan in the Stata community. I have found it helpful
in my own work to be able to use, and to write -egen-
functions. But it is not, itself, an enormous deal. It is at root
a rag-bag of convenient short-cuts. For example,
if -egen, total()- did not exist, we could get
there typically in two lines instead of one,
as in
bysort bar: egen foototal = total(foo)
being done by
bysort bar : gen foototal = sum(foo)
by bar: replace foototal = foototal[_N]
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
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WWW (personal): http://www.nd.edu/~rwilliam
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