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Re: st: Re: reshape when the stub is at the beginning of the variables


From   "Ada Ma" <heu034@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: reshape when the stub is at the beginning of the variables
Date   Wed, 26 Apr 2006 23:22:17 +0100

Carol Bao's friend data set looks interesting.  I had not noticed the
atwl option before.  If the variable names were:
ID   WaveA WaveB WaveC ASMOK BSMOK CSMOK

I could have reshaped it long in one shot:
reshape long @SMOK Wave, i(ID) j(type) atwl() string

But unfortunate they are not, they are:
ID   Wave1 Wave2 Wave3 ASMOK BSMOK CSMOK

Is it still possible to reshape both the Wave variables and the SMOK
variables in one shot?



On 4/26/06, Michael Blasnik <michael.blasnik@verizon.net> wrote:
> Check out the advanced syntax for reshape.  I believe that you can specify
> the location of the "j" part of the variable names using the @ symbol.  I
> haven't used this option in a while, but I think you will need to specify
> that the j variable is a string and may need to use the atwl() option for
> the reshape xij line.
>
> reshape xij @SMOK
>
> Michael Blasnik
> michael.blasnik@verizon.net
>
> ----- Original Message -----
> From: "Carol Bao" <yanjunbb@yahoo.com>
> To: <statalist@hsphsun2.harvard.edu>
> Cc: <nmani1@uic.edu>
> Sent: Tuesday, April 25, 2006 7:01 PM
> Subject: st: reshape when the stub is at the beginning of the variables
>
>
> > Hi, I am asking this for a friend:
> >
> > She has a data set in its wide form like this:
> >
> > ID   Wave1 Wave2 Wave3 ASMOK BSMOK CSMOK
> > 1     0      1     1    .      1     0
> > 2     1      1     0    1      0     .
> >
> > Which reads: for person 1, he/she appears in wave 2
> > and wave 3 of the survey and reports to smoke in wave
> > 2 (BSMOK) and not smoke in wave 3 (CSMOK).  For person
> > 2, he/she is interviewed in wave 1 and 2 but drops out
> > in wave 3 and reports to smoke in wave 1 and not in
> > wave 2.
> >
> > The question is, the stub for reshape into variable
> > SMOK appears at the beginning of the variables as A, B
> > and C respectively for three waves (all the other
> > variables as well).  Is there any easier way to
> > reshape the data? Or any suggestions?
> >
> > Thanks,
> >
> > Carol
>
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>


--
Ada Ma
Research Fellow
Health Economics Research Unit
University of Aberdeen, UK.
http://www.abdn.ac.uk/heru/
Tel: +44 (0) 1224 553863
Fax: +44 (0) 1224 550926

*
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