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Re: st: Re: polychoric


From   Philip Ryan <philip.ryan@adelaide.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: polychoric
Date   Tue, 03 Feb 2004 08:53:00 +1030

Stas

You should be cautious using -inspect- to return the number of unique values. It runs out of steam after 99 distinct values and thereafter reports r(N_unique) as missing. This may cause problems in your program. -tabulate- (then look at r(r) ) is a better option, but it too has limits.

Nick Cox and Gary Longton have a useful FAQ on the subject and point to some user-written solutions:

http://www.stata.com/support/faqs/data/distinct.html

Phil






At 02:47 PM 2/02/2004 -0500, you wrote:

--- Nick Winter wrote:
> You might be able to make good use of the -inspect- command; when run on
> a single variable, it seems to leave behind the number of unique values
> in r(N_unique)

Cool! That solved it. Another update available, then.

 ---                                    Stas Kolenikov
 --       Ph.D. student in Statistics at UNC-Chapel Hill
 - http://www.komkon.org/~tacik/  -- Stas.Kolenikov@unc.edu

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