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st: RE: Create categorical variable based on 'z-score'


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Create categorical variable based on 'z-score'
Date   Wed, 26 Nov 2008 17:37:17 -0000

Despite various answers, no one mention -egen, std()- followed by 
-floor()- and -ceil(). All existing official Stata. 

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

George Hoffman

Generic problem: I'd like to create categorical variables for a list of
continuous variables. The categorical variables would be based upon the
z-score of each variable, such as:
Z-score of X     catX
<-2             -3
-2 ..-1         -2
-1 .. 0         -1
0               0
0.. +1          +1
1 ..2           +2
>+2             +3

If there were a way to z-transform variables, I could do an easy
recode(catX)


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