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RE: st: RE: RE: manipulating string variables


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: RE: manipulating string variables
Date   Mon, 31 Jul 2006 17:59:46 +0100

You can do this, as experiment will show. 

Given 

global dem "age sex" 
global dem1 "age" 

you can set 

global reg1 "reg hours $dem" 

in which case -reg1- will contain 

"reg hours age sex" 

or you can set 

global reg1 "reg hours $dem1" 

in which case -reg1- will contain

"reg hours age" 

Trailing spaces can also be added as desired. 
Whichever definition is last in a session will
overwrite any previous ones. 

Nick 
n.j.cox@durham.ac.uk 

Jean Eid
 
> One more question regarding manipulating global macros. Is there a way
> to do the following
> global  reg1 "reg hours $dem ";
> where $dem is defined as
> 
> global dem "age sex";
> 
> and
> 
> global dem1 "age";
> 
> now I want to replace $dem with $dem1 in $reg1
> 
> All the solutions below do not work since stata attempts to 
> execute the
> global macro $dem when calling global macro $reg1.
> 

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