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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 16:49:28 -0500 |

Thanks, Martin and Michael, both for your hints and for the exegetic exercise on my words, which I found amusing. -rolling- seems to be doing the job I want, especially if combined with "[r]recursive". The problem I see there is that I can perform only one command within the "frame" of this rolling window, not a series of commands (like postestimation commands), as I was thinking of when specifying it as a loop. That's why I agree with Michael's points, and I find your solution, Martin, to use a loop beforehand to fill a -local- with the desired end dates very promising. @ Martin: I did not really care about what kind of list, I was indeed just trying to explain my goal in pseudo-code. So am I allowed to rephrase my suggestion before, inventing a new type of list, call it "timelist"? That would have been my dream (and to all German readers: please note the "pseudo" in "pseudo-code"): *** begin pseudo-code foreach t of timelist 1992q1/2000q4 { reg y L.y L.x if tin(1960q1, `t') } *** end pseudo-code Best, and thanks again! AC On Wed, Dec 3, 2008 at 4:34 PM, Martin Weiss <martin.weiss1@gmx.de> wrote: > BTW, Augusto did not even pretend that his was a -numlist-; if he had > thought it was one, he would have said something like "...of numlist > blabla". His example looks like "any_list" in the -h foreach- parlance. He > could of course use a loop beforehand to fill a -local- with the desired end > dates and use that in the -foreach- ... > > HTH > Martin > _______________________ > ----- Original Message ----- From: "Michael Hanson" <mshanson@mac.com> > To: <statalist@hsphsun2.harvard.edu> > Sent: Wednesday, December 03, 2008 10:29 PM > Subject: Re: st: Re: Running a foreach loop over a sequence of dates > > >> Ah, so true -- but by labeling it as "pseudo-code", Augusto indicated that >> he already knew that. Nonetheless, looping over dates would be *extremely* >> high on my list of wishes & grumbles! Perhaps in Stata 11.... or even 10.2. >> (Since, in the end, dates are just formatted numbers, this seems as if it >> should be possible in theory.) There are applications in which something >> much more light-weight than - rolling- would be appropriate. Although I >> agree that the example below could likely be accomplished with -rolling-. >> >> -- Mike >> >> On Dec 3, 2008, at 4:05 PM, Martin Weiss wrote: >> >>> You cannot simply abbreviate your list of end dates like a - numlist- >>> with a slash and hope for Stata`s acquiescence... I would recommend you >>> look at -h rolling- >>> >>> HTH >>> Martin >>> _______________________ >>> ----- 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') >>>> } >>>> >>>> *** end pseudo-code >>>> >>>> I am sorry if this is a trivial question, but I really could not find >>>> a way of performing this. Thanks for any hints. >>>> >>>> AC >>>> * >>>> * For searches and help try: >>>> * http://www.stata.com/help.cgi?search >>>> * http://www.stata.com/support/statalist/faq >>>> * http://www.ats.ucla.edu/stat/stata/ >>> >>> >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/statalist/faq >>> * http://www.ats.ucla.edu/stat/stata/ >> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/statalist/faq >> * http://www.ats.ucla.edu/stat/stata/ >> > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Running a foreach loop over a sequence of dates***From:*"Augusto Cadenas" <aug.cadenas@googlemail.com>

**st: Re: Running a foreach loop over a sequence of dates***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**Re: st: Re: Running a foreach loop over a sequence of dates***From:*Michael Hanson <mshanson@mac.com>

**Re: st: Re: Running a foreach loop over a sequence of dates***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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