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st: R: RE: replacing after egen


From   "Carlo Lazzaro" <[email protected]>
To   <[email protected]>
Subject   st: R: RE: replacing after egen
Date   Thu, 5 Jul 2007 12:37:36 +0200

Dear Dirk and Rajesh,

thanks a lot for Your Kind hints, examples and for Your Time.

I was really stuck on this trivial issue!

Thanks a lot again and Kind Regards,

Carlo


-----Messaggio originale-----
Da: [email protected]
[mailto:[email protected]] Per conto di Rajesh Tharyan
Inviato: gioved� 5 luglio 2007 12.23
A: [email protected]
Oggetto: st: RE: replacing after egen

Hi,

I believe the command you want is

egen sum=rsum(Alfa Beta)

replace does work after egen!

See this for yourself

***evidence.do***

sysuse auto,clear
keep if make=="Subaru"
list make length turn
egen sum=rsum(length turn)
list make length turn sum
replace length=1 if length>160
list make length turn sum
* of course now you need to do rsum again to make the changes
drop sum
egen sum=rsum(length turn)
list make length turn sum

you CANNOT say replace sum=rsum(length turn)

see more at

http://dss.princeton.edu/online_help/stats_packages/stata/stata_gen.htm

hope this helps
rajesh


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Carlo Lazzaro
Sent: 05 July 2007 10:42
To: [email protected]
Subject: st: replacing after egen



Dear Statalisters,

I beg Your pardon for my trivial thread.

I have calculated via egen the total number of administrations of a given
drugs (Alfa=parenteral; Beta=per os). 

egen Sum=rowtotal(Alfa Beta)

Now I have to amend the data in Alfa, but I notice that replace doesn't work
after egen. Besides, I wasn't able to fin  about this issue seem to arise
from Stata Data Management Manual (egen section).

Any suggestions would be highly appreciated.

Thanks a lot for Your Kindness and for Your Time.

Kind Regards,

Carlo


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