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st: RE: A query about min in stata


From   "Martin Weiss" <martin.weiss@uni-tuebingen.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: A query about min in stata
Date   Fri, 22 Aug 2008 13:00:41 +0200

If that is supposed to be some kind of "rolling" estimation,

*************
sysuse auto , clear
g rollingmin=.
forv i =1/65{
qui su mpg in `i'/`=`i'+9'
di in red "min in `i' to `=`i'+9': " r(min) _n
qui replace rollingmin = r(min) in `i'
}

l rollingmin
*************

HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Ashim Kapoor
Sent: Friday, August 22, 2008 12:43 PM
To: statalist@hsphsun2.harvard.edu
Cc: surjit.bhalla@oxusinvestments.com
Subject: st: A query about min in stata

Hello everyone,

I am trying to do the following : -

I have a variable r. I want to create a variable m=min( r, r[_n-1],
... ,r[_n-9])

I guess I can use a while loop to do this but that is quite slow. An
alternative would be to define r0=r,r1=r[_n-1],..,r9=r[_n-9]
and then say m=rmin ( r0 r1 ... r9).

My question is that is there a built in way in stata to do this ? like
say by using egen ?

Thank you all for your time and effort.

Ashim. : )
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