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RE: st: identify group of observations


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: identify group of observations
Date   Thu, 29 Apr 2004 13:23:05 +0100

Good point. However, as we're playing minor improvements, 
note this too needs a fix: 

gen grp = sum(flag == "01") if flag == ""

or 

gen grp = sum(flag == "01") if mi(flag) 

or perhaps even 

gen grp = sum(flag == "01") if trim(flag) == ""

to catch "missings" that are somehow spaces. 

Any more? 

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

Nick Winter

> >Or just
> >
> >gen grp = sum(flag == "01")
> 
> Or, to avoid assigning grp values to missing values of flag:

> gen grp = sum(flag == "01") if flag < . 

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