Re: st: Excluding missing values

[Richard Goldstein <richgold@ix.netcom.com>]

Stata allows up to 27 missing value codes (.a, .b, etc., as well as .); 
the other 26 are considered to be "higher" than .; so your second choice 
(!=.) would eliminate missing when coded as . but not when coded as .a, etc.

Rich

Tunga Kantarci wrote:

> To exclude missing values, stata help indiactes one should use 
> <.
>
> However, 
> !=.
>
> also works.
>
> In which situation the second command would be faulty?
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