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Re: st: RE: Standard deviation of variable between dates
From
Joseph Monte <[email protected]>
To
[email protected]
Subject
Re: st: RE: Standard deviation of variable between dates
Date
Tue, 14 Sep 2010 16:44:37 -0400
Martin,
I was not aware of -rolling-. I was trying to use -egen- with std dev
in a loop, but to no avail. Will let you know how I fare.
Thanks,
Joe
On Tue, Sep 14, 2010 at 2:12 PM, Martin Weiss <[email protected]> wrote:
>
> <>
>
> Have you tried -rolling-?
>
>
> HTH
> Martin
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Joseph Monte
> Sent: Dienstag, 14. September 2010 19:57
> To: statalist
> Subject: st: Standard deviation of variable between dates
>
> Hi Statalisters,
>
> Based on the table below, I need the standard deviation of vwretd
> between revfdate1[_n+1] (i.e. not including revfdate1) and offerdate1
> while revfdate1[_n+`i']<=offerdate1, where i goes from 1 to 300
> (basically the max length between revfdate1 and offerdate1 is 300).
> So, using obs 23 as an example, I want the std dev of -.00223069 and
> .00704247. to be entered alongside obs 23 in a new variable. This new
> variable should similarly contain all the resulting std deviations.
> So, based on the table, there would be three std dev values ( obs 8,
> 14 & 23). I hope my explanation is clear.
>
> | revfdate1 offerdate1 vwretd |
> |------------------------------------|
> 1. | 02jan1996 . .00661722 |
> 2. | 03jan1996 . -.00014537 |
> 3. | 04jan1996 . -.0076854 |
> 4. | 05jan1996 . -.00103026 |
> 5. | 08jan1996 . .00268481 |
> |------------------------------------|
> 6. | 09jan1996 . -.0158739 |
> 7. | 10jan1996 . -.01555297 |
> 8. | 11jan1996 20mar1996 .00843481 |
> 9. | 12jan1996 . -.00099131 |
> 10. | 15jan1996 . -.0052766 |
> |------------------------------------|
> 11. | 16jan1996 . .01000137 |
> 12. | 17jan1996 . -.00052036 |
> 13. | 18jan1996 . .00378893 |
> 14. | 19jan1996 07feb1996 .0056981 |
> 15. | 22jan1996 . .00429229 |
> |------------------------------------|
> 16. | 23jan1996 . -8.435e-06 |
> 17. | 24jan1996 . .01023512 |
> 18. | 25jan1996 . -.00367997 |
> 19. | 26jan1996 . .00624507 |
> 20. | 29jan1996 . .00404597 |
> |------------------------------------|
> 21. | 30jan1996 . .00915902 |
> 22. | 31jan1996 . .00800156 |
> 23. | 01feb1996 05feb1996 .00463789 |
> 24. | 02feb1996 . -.00223069 |
> 25. | 05feb1996 . .00704247 |
> |------------------------------------|
> 26. | 06feb1996 . .00684131 |
> 27. | 07feb1996 . .00349892 |
> 28. | 08feb1996 . .00772813 |
>
>
> Thanks,
>
> Joe
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