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RE: st: AW: Keeping variable After restore


From   "Levy, Douglas E., Ph.D." <DLEVY3@PARTNERS.ORG>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: AW: Keeping variable After restore
Date   Mon, 9 Nov 2009 10:19:01 -0500

In the code you have below, the "if" has to be before the comma:

factor wbq91-wbq93 if year == 2005, factors(1) 

Best,
Doug

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of C.T. Shehzad
Sent: Monday, November 09, 2009 10:04 AM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: AW: Keeping variable After restore

Dear Martin:

Thanks for your reply. However, stata says  "option if not allowed". It 
has happened before as well that conditionals do not work as option.

factor wbq91-wbq93, factors(1) if year == 2005
option if not allowed
r(198)

Thanks again and best regards,

Tanveer

Martin Weiss wrote:
> <> 
>
> Instead of -keep-ing the year 2000:
>
> ***
> webuse bg2, clear
> gen year=2000*(_n<200)+ /* 
> */ 2001*(_n>=200)
> qui factor bg2cost1-bg2cost6  /* 
> */ if year==2000
> predict var1
> ***
>
> and off you go...
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von C.T. Shehzad
> Gesendet: Montag, 9. November 2009 15:22
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: Keeping variable After restore 
>
> Dear Stata-listers:
>
> I want to generate a variable during (preserve - restore) and want to 
> use that after restoring the data. When I will restore data the variable 
> will be dropped automatically. How can I keep the variable?
>
> The data is time series and a simple version of my program is as follows:
>
> preserve
> keep if year == 2000
> factor x1 x2 x3
> predict var1
> restore
>
> gsort -year
> replace var1= var1[_n-1] if var1 >= .
> xtset country year
> xtreg dep var1 controls
>
> The problem in this program is that after restoring the data I will not 
> have var1 anymore. What can be a possible solution?
>
> Thanks and best regards,
>
> Tanveer
>
>
>
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-- 
Choudhry Tanveer Shehzad (Tanveer)
PhD Student
Department of Finance,
Faculty of Economics & Business,
University of Groningen,
Nettelbosje 2 
9747 AE Groningen 
The Netherlands
Mobile: 0031-644801970
Home Page: http://www.rug.nl/staff/c.t.shehzad/

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