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st: about macro's double quotes


From   "G. Dai" <dgecon@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: about macro's double quotes
Date   Tue, 9 Mar 2010 11:19:33 -0800

dear all,
I'm a first time  user of macros. As you can see from below, I want to
generate a  new var r`i'pnhm when x=md.  After execute the do file, it
runs smoothly for x=md. After that, however, I was always reminded by STATA
that
               r5pnhm5y already defined
               r(110);
so what's wrong with the following program. BTW,I'm little bit confused by
the macro
quotes, can anyone say tips?
regards,
Guang



global set "md mom dad";
foreach x in $set {;
forvalues i=5/8{;
gen r`i'pnhm=. if "`x'"=="md";
replace r`i'pnhm=int(10*r`i'pnhm5y)/10 if "`x'"=="md";
....
};

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