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st: RE: Errors in egen, total()
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You have to tell Stata to make the new variable "double"
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bys title week: egen double cumrev=total(rev)
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See http://www.stata.com/help.cgi?datatypes
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Mike Kim
Sent: Sonntag, 13. Dezember 2009 05:20
To: [email protected]
Subject: st: Errors in egen, total()
Hello all,
I used "egen total()" to create "cumrev" like the following, but if there is
only one week per title, total gives a slightly lower number than the
original number in some cases (1 or 2 lower). Any idea about why it produces
different numbers?
bys title week: egen cumrev=total(rev)
title week rev cumrev
A 707 28536717 28536716
A 708 10 30
A 708 20 30
B 801 .....
......
Thank you,
Mike.
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* http://www.ats.ucla.edu/stat/stata/