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Re: st: AW: Keeping variable After restore


From   "C.T. Shehzad" <C.T.Shehzad@rug.nl>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: Keeping variable After restore
Date   Mon, 09 Nov 2009 16:41:10 +0100

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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--
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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