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


From   "Augusto Cadenas" <aug.cadenas@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Running a foreach loop over a sequence of dates
Date   Wed, 3 Dec 2008 18:04:07 -0500

That's a lovely solution! Thank you very much.

AC

On Wed, Dec 3, 2008 at 5:52 PM, Brian P. Poi <bpoi@stata.com> wrote:
>> ----- 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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