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Re: st: Re: Running a foreach loop over a sequence of dates


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Re: Running a foreach loop over a sequence of dates
Date   Thu, 4 Dec 2008 00:07:48 +0100

But note -help dates and times-

"Historical note: pseudofunctions ... tq(), and th() used to be called ... q(), and h(). Those names still work but are considered
       anachronisms."


HTH
Martin
_______________________
----- Original Message ----- From: "Brian P. Poi" <bpoi@stata.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, December 03, 2008 11:52 PM
Subject: Re: st: Re: Running a foreach loop over a sequence of dates


----- Original Message ----- From: "Augusto Cadenas"
<aug.cadenas@googlemail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, December 03, 2008 10:02 PM
Subject: st: Running a foreach loop over a sequence of dates

Hello,

I am trying to run a series of commands in a time series setting, and
interested in using variable time intervals (variable time  windows, or
variable start/end dates). So ideally, I would like to loop with
-foreach- over a series of dates, but I cannot find the way of doing
this. To give you an idea of the kind of problem, here it is in
pseudo-code (not working):

*** begin pseudo-code

foreach t in 1992q1/2000q4 {
     reg y L.y L.x if tin(1960q1, `t')
     reg y L.y L.x if tin(`=`t'-20', `t')
}

 How about this:

   forvalues t = `=q(1992q1)'/`=q(2000q4)' {
      reg y L.y L.x if date >= q(1960q1) & date <= `t'
      reg y L.y L.x if date >= `t'-20 & date <= `t'
   }


 where date is your quarterly date variable.

   -- Brian Poi
   -- bpoi@stata.com

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