***************+
sysuse auto, clear
*get the levels of mpg (a in your xmpl)
levelsof mpg, loc(levels)
*loop through them, create new vars along the way
*price takes place of b in your code, headroom is c
foreach lev of loc levels{
g result`lev'=`lev'*price- headroom
}
*get the means from -summarize-
su result*
***************
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Carlo Lazzaro
Sent: Tuesday, October 14, 2008 10:50 AM
To: [email protected]
Subject: st: a possible - foreach - question?
Dear Statalisters,
I have three variables (a; b; C with 10,000 observations each) in long
format.
For each value of a I would like to obtain the following one:
(a1 * b1) - c1
.
.
.
.
(a1*b10,000)-c10,000;
Repeat the above reported would-be 10,000 times (i.e., from a1 to a10,000)
Create a new variable d in which the mean of each one of the 10,000
iterations are stored and can be displayed.
I suppose there's way of doing this with Stata 9.2/SE, but I cannot figure
out the proper syntax.
Thanks a lot for your kindness and for your time.
Kind Regards,
Carlo
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