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

[George Hoffman <ghoffman@mcw.edu>]

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)

Thanks!
George hoffman

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