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st: Optimizing recoding procedures


From   Thomas Lux <tholux2000@yahoo.de>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Optimizing recoding procedures
Date   Tue, 11 Dec 2012 16:56:08 +0000 (GMT)

Dear Statalisters,

I am trying to optimize my data recoding procedures (in Stata 11).
With the inlist-function it is possible to reduce the syntax in such a way:



gen x = 1 if z==1

replace x = 0 if x==1 | x==2 | x==3


gen x = 1 if z==1
replace x = 0 if inlist(y, 1, 2, 3)


However, I am looking for functions that allow a reduction in a situation with two variables in the (second) if statement:


gen x = 1 if z==1replace x = 0 if x==1 | x==2 | x==3 | y==1 | y==2 | y==3

and:


geb x = 1 if z==1replace x = 0 if x==1 & x==2 & x==3 & y==1 & y==2 & y==3


Is there a way of doing this via a DIRECT function in the if statement (that is without taking the indirect route via "egen ral" respectively "egen rany")?


Best, 

Thomas Lux
University of Bremen

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