Re: st: AW: Keeping variable After restore

["C.T. Shehzad" <C.T.Shehzad@rug.nl>]

Thanks Levy...It was the mistake I was making.

Thanks Martin, Levy and Eric for the help.

Best wishes,

Tanveer

Levy, Douglas E., Ph.D. wrote:
> 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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> >
> >
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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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